What are the cheapest airlines flying from St. Louis to London round-trip?

United Airlines, at £587, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include British Airways and Air Canada. Users have found that United Airlines is 22% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St. Louis to London one-way?

The cheapet airlines for a one-way flight from St. Louis to London are Aer Lingus (£376), Lufthansa (£413), and British Airways (£418).

What is the cheapest day to fly from St. Louis to London?

Travellers seeking maximum savings on their St. Louis to London flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from St. Louis to London?

While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London City, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.

What are the most popular airlines that fly from St. Louis to London?

American Airlines, British Airways and KLM are the most popular airlines when flying from St. Louis to London.

What is the cheapest day to fly round-trip from St. Louis to London?

Wednesday flights are generally found to be more expensive for flights from St. Louis to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from St. Louis to London?

To save up to 25% on this flight, we recommend booking at least 27 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to London from £686 1-2 weeks out and tickets from £686 for flights departing within the next 72 hours.

What is the cheapest month to fly from St. Louis to London?

April is one of the best times of the year to fly to London from St. Louis. Prices for April average £754 per person but you can even find prices for as low as £499. The most expensive prices can be found in the month of June. Opting for a April flight can save you 48% on your journey compared to booking in June

What airport do you fly from for flights from St. Louis to London?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 0 outbound flights to London per day from 5 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from St. Louis to London that include hotel bookings?

Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from St. Louis to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.

Can I find deals for business class flights from St. Louis to London?

Yes. Cheapflights offers flight deals from St. Louis to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£280+ Flights from St. Louis to London

The best prices from Lambert-St Louis to London are usually found in April or February, booked 26 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to London

Round-trip from	£587
One-way from	£280
Popular in	June
Cheapest in	April
Average price	£668

United Airlines
16/3-26/3
2 total stops
59h 28m total
St. Louis to London

Search Deals

2/3
3 total stops
55h 42m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£146 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£28 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 2025

Search Deals

Find flight deals from St. Louis to London

Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2025.

Sun 16/317:33STL - LHR

1 stop33h 22mUnited Airlines

Wed 26/318:00LHR - STL

1 stop26h 06mUnited Airlines

Deal found 22/1£587

Mon 10/318:29STL - LHR

1 stop10h 31mBritish Airways

Mon 17/319:25LHR - STL

2 stops30h 16mBritish Airways

Deal found 21/1£589

Tue 15/408:00STL - LHR

2 stops16h 30mAir Canada

Wed 7/506:50LHR - STL

2 stops14h 26mAir Canada

Deal found 21/1£589

Mon 3/211:04STL - LHR

2 stops14h 51mVirgin Atlantic

Tue 18/211:45LHR - STL

2 stops16h 04mVirgin Atlantic

Deal found 22/1£593

Sun 2/215:45STL - STN

2 stops21h 25mMultiple Airlines

Mon 10/219:35STN - STL

2 stops33h 55mMultiple Airlines

Deal found 22/1£593

Sun 23/313:06STL - LHR

1 stop12h 14mDelta

Tue 1/406:30LHR - STL

2 stops15h 13mDelta

Deal found 22/1£597

Sat 11/1016:05STL - LHR

1 stop32h 30mMultiple Airlines

Tue 21/1018:30LHR - STL

1 stop25h 00mMultiple Airlines

Deal found 22/1£598

Sun 30/316:45STL - LHR

1 stop12h 25mAir France

Thu 10/411:45LHR - STL

1 stop15h 51mAir France

Deal found 22/1£602

Sun 30/315:30STL - LHR

1 stop13h 10mLufthansa

Fri 11/406:30LHR - STL

2 stops15h 17mLufthansa

Deal found 22/1£605

Tue 6/518:23STL - LHR

1 stop10h 07mIberia

Wed 14/514:25LHR - STL

1 stop14h 58mIberia

Deal found 22/1£614

Sun 16/316:45STL - LCY

1 stop11h 40mLufthansa

Wed 26/310:00LCY - STL

2 stops18h 33mLufthansa

Deal found 22/1£619

Sun 16/315:50STL - LCY

2 stops16h 00mMultiple Airlines

Tue 25/309:15LCY - STL

2 stops34h 51mMultiple Airlines

Deal found 22/1£622

Best flights from St. Louis to London
Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 January 2025.

Sun 16/317:33STL - LHR

1 stop33h 22mUnited Airlines

Wed 26/318:00LHR - STL

1 stop26h 06mUnited Airlines

Deal found 22/1£587

Mon 10/318:29STL - LHR

1 stop10h 31mBritish Airways

Mon 17/319:25LHR - STL

2 stops30h 16mBritish Airways

Deal found 21/1£589

Tue 15/408:00STL - LHR

2 stops16h 30mAir Canada

Wed 7/506:50LHR - STL

2 stops14h 26mAir Canada

Deal found 21/1£589

Mon 3/211:04STL - LHR

2 stops14h 51mVirgin Atlantic

Tue 18/211:45LHR - STL

2 stops16h 04mVirgin Atlantic

Deal found 22/1£593

Sun 2/215:45STL - STN

2 stops21h 25mMultiple Airlines

Mon 10/219:35STN - STL

2 stops33h 55mMultiple Airlines

Deal found 22/1£593

Sun 23/313:06STL - LHR

1 stop12h 14mDelta

Tue 1/406:30LHR - STL

2 stops15h 13mDelta

Deal found 22/1£597

Sun 30/316:45STL - LHR

1 stop12h 25mAir France

Thu 10/411:45LHR - STL

1 stop15h 51mAir France

Deal found 22/1£602

Sun 30/315:30STL - LHR

1 stop13h 10mLufthansa

Wed 9/406:30LHR - STL

2 stops15h 17mLufthansa

Deal found 22/1£605

Tue 6/518:23STL - LHR

1 stop10h 07mIberia

Wed 14/514:25LHR - STL

1 stop14h 58mIberia

Deal found 22/1£614

Sat 22/210:59STL - LHR

2 stops23h 01mScandinavian Airlines

Thu 27/219:30LHR - STL

2 stops34h 07mScandinavian Airlines

Deal found 22/1£733

Fri 21/308:49STL - LGW

2 stops17h 41mAmerican Airlines

Sun 30/310:40LGW - STL

2 stops19h 16mAmerican Airlines

Deal found 22/1£764

Thu 6/305:55STL - LHR

2 stops20h 10mAer Lingus

Fri 7/312:10LHR - STL

2 stops15h 53mAer Lingus

Deal found 22/1£923

Last-minute flights from St. Louis to London
Discover last-minute flight deals from St. Louis to London. Data last updated 23 January 2025 and is based on user searches.

Tue 28/117:30STL - LGW

2 stops33h 55mTurkish Airlines

Tue 4/210:15LGW - STL

2 stops35h 23mTurkish Airlines

Deal found 22/1£968

Tue 28/117:30STL - LHR

2 stops39h 25mTurkish Airlines

Tue 4/222:35LHR - STL

2 stops23h 03mTurkish Airlines

Deal found 22/1£1,000

Tue 28/115:10STL - LHR

1 stop11h 05mBritish Airways

Tue 4/214:10LHR - STL

1 stop13h 59mBritish Airways

Deal found 22/1£1,324

Tue 28/115:50STL - LCY

2 stops15h 00mMultiple Airlines

Tue 4/209:15LCY - STL

2 stops35h 51mMultiple Airlines

Deal found 22/1£1,361

Fri 31/117:30STL - LHR

1 stop11h 45mLufthansa

Wed 5/206:30LHR - STL

1 stop13h 25mLufthansa

Deal found 22/1£6,474

Fri 31/111:28STL - LHR

1 stop16h 47mAustrian Airlines

Wed 5/206:00LHR - STL

2 stops17h 36mAustrian Airlines

Deal found 22/1£6,552

Sun 2/215:45STL - STN

2 stops21h 25mMultiple Airlines

Mon 10/219:35STN - STL

2 stops33h 55mMultiple Airlines

Deal found 22/1£593

Sun 2/216:36STL - LHR

1 stop32h 54mMultiple Airlines

Mon 10/214:30LHR - STL

1 stop30h 36mMultiple Airlines

Deal found 22/1£627

Sun 2/215:45STL - LGW

2 stops20h 50mMultiple Airlines

Mon 10/219:20LGW - STL

2 stops34h 10mMultiple Airlines

Deal found 22/1£636

Sun 2/214:00STL - LCY

2 stops17h 45mBritish Airways

Mon 10/217:00LCY - STL

2 stops32h 30mBritish Airways

Deal found 22/1£663

Sun 2/215:45STL - LCY

1 stop19h 55mLufthansa

Mon 10/210:00LCY - STL

2 stops19h 30mLufthansa

Deal found 22/1£679

Mon 3/211:04STL - LHR

2 stops14h 51mVirgin Atlantic

Tue 18/211:45LHR - STL

2 stops16h 04mVirgin Atlantic

Deal found 22/1£593

One-way flights from St. Louis to London
Search for one-way flight options from St. Louis to London. Find affordable one-way fares based on user searches. Data last updated 23 January 2025.

Sun 2/323:08STL - LHR

3 stops55h 42mMultiple Airlines

Deal found 22/1£280

Sun 2/315:50STL - STN

2 stops21h 30mMultiple Airlines

Deal found 22/1£369

Thu 6/218:00STL - LHR

2 stops14h 25mAer Lingus

Deal found 21/1£376

Tue 28/112:15STL - LGW

3 stops16h 40mMultiple Airlines

Deal found 22/1£378

Sun 2/315:50STL - LTN

2 stops15h 55mMultiple Airlines

Deal found 22/1£387

Sun 2/311:04STL - LCY

2 stops19h 36mAer Lingus

Deal found 22/1£391

Sun 2/315:45STL - LCY

1 stop18h 55mLufthansa

Deal found 22/1£413

Thu 6/213:40STL - LHR

1 stop12h 35mBritish Airways

Deal found 21/1£418

Fri 14/316:45STL - LHR

2 stops13h 25mDelta

Deal found 22/1£424

Sun 2/323:08STL - LCY

3 stops35h 02mMultiple Airlines

Deal found 22/1£457

Thu 6/211:38STL - LCY

2 stops17h 12mBritish Airways

Deal found 21/1£494

Thu 6/213:40STL - LGW

2 stops23h 10mBritish Airways

Deal found 21/1£500

Find flights from St. Louis to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 16/3

17:33-07:55

1 stop33h 22m

London Heathrow

Wed 26/3

18:00-15:06

1 stop26h 06m

£587

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 10/3

18:29-10:00

1 stop10h 31m

London Heathrow

Mon 17/3

19:25-20:41

2 stops30h 16m

£589

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 15/4

08:00-06:30

2 stops16h 30m

London Heathrow

Wed 7/5

06:50-15:16

2 stops14h 26m

£589

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 3/2

11:04-07:55

2 stops14h 51m

London Heathrow

Tue 18/2

11:45-21:49

2 stops16h 04m

£593

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 2/2

15:45-19:10

2 stops21h 25m

London Stansted

Mon 10/2

19:35-23:30

2 stops33h 55m

£593

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 23/3

13:06-06:20

1 stop12h 14m

London Heathrow

Tue 1/4

06:30-15:43

2 stops15h 13m

£597

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 30/3

16:45-11:10

1 stop12h 25m

London Heathrow

Thu 10/4

11:45-21:36

1 stop15h 51m

£602

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 30/3

15:30-10:40

1 stop13h 10m

London Heathrow

Fri 11/4

06:30-15:47

2 stops15h 17m

£605

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 13/5

13:30-06:30

1 stop11h 00m

London Heathrow

Tue 20/5

10:30-20:01

2 stops15h 31m

£606

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 6/5

18:23-10:30

1 stop10h 07m

London Heathrow

Wed 14/5

14:25-23:23

1 stop14h 58m

£614

Flights are sorted by cheapest return flights first.

Deals found on 22/1

Showing 1-10 of 48 results

...

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to London

Get recent, data-driven insights about flights from St. Louis to London including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to London?

Booking 26 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to London?

Currently, January is the cheapest month in which you can book a flight from St. Louis to London (average of £112). Flying from St. Louis to London in August is currently the most expensive (average of £161). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to LON?

It’s optimal to fly from St. Louis to London in the morning. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight in the evening.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Read through reviews of airlines operating flights from St. Louis to London, such as British Airways, Delta and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

8,512 reviews

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,286 reviews

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.5

Good

787 reviews

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.5

Good

663 reviews

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.4

Good

1,489 reviews

Delta

8.0

Very Good

8,512 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from St. Louis to London?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 0 outbound flights to London per day from 5 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
What are the cheapest airlines flying from St. Louis to London round-trip?
United Airlines, at £587, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include British Airways and Air Canada. Users have found that United Airlines is 22% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from St. Louis to London one-way?
The cheapet airlines for a one-way flight from St. Louis to London are Aer Lingus (£376), Lufthansa (£413), and British Airways (£418).
What are the most popular routes from St. Louis to London?
While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London City, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.
Can I find deals for flights from St. Louis to London that include hotel bookings?
Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from St. Louis to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.
Can I find deals for business class flights from St. Louis to London?
Yes. Cheapflights offers flight deals from St. Louis to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to London?
Currently, January is the cheapest month in which you can book a flight from St. Louis to London (average of £112). Flying from St. Louis to London in August is currently the most expensive (average of £161). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Deal

Hounslow

Gatwick

Croydon

Milton Keynes

Slough

Luton

Ilford

Hayes

Eastbourne

Maidstone

Crawley

Winchester

Southend-on-Sea

Wembley

Ipswich

Watford

Southall

Stansted

Sutton

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from St. Louis to London

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£552	Average£572	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£559	Average£1,259	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Virgin Atlantic	Cheapest£564	Average£924	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£619	Average£909	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£639	Average£869	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

How does Cheapflights help users find flights from St. Louis to London?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to London?

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from St. Louis to London with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to London with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to London become cheaper?

Yes! Start tracking prices for St. Louis to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from St. Louis to London from £280

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from Lambert-St Louis to London are usually found in April or February, booked 26 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to London

Cheapest flights from St. Louis to LondonExplore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2025.

Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2025.

Find flights from St. Louis to London within your budget

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to London

Get recent, data-driven insights about flights from St. Louis to London including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to London?

Use this chart to determine the optimal time to book a return flight from St. Louis to London. Price data was last updated on 17 January 2025.

What is the cheapest month to book a flight from St. Louis to London?

What is the cheapest time of day to fly from STL to LON?

Find hourly flight availability from St. Louis to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 January 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Read through reviews of airlines operating flights from St. Louis to London, such as British Airways, Delta and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to London?

What are the cheapest airlines flying from St. Louis to London round-trip?

What are the cheapest airlines to fly from St. Louis to London one-way?

What are the most popular routes from St. Louis to London?

Can I find deals for flights from St. Louis to London that include hotel bookings?

How can I find direct flights from St. Louis to London?

Can I find deals for business class flights from St. Louis to London?

What is the cheapest month to book a flight from St. Louis to London?

Travelling to a place near St. Louis?

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Alternative routes for St. Louis to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from St. Louis to London

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How does Cheapflights help users find flights from St. Louis to London?

Why should you use Cheapflights to find cheap flight tickets from St. Louis to London?

Can Cheapflights find flights from St. Louis to London with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to London become cheaper?

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Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2025.