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Cheap flights from San Antonio to London Heathrow Airport from £256

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
30 maalis — 6 huhti1
1 adult

Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or April, booked 51 days in advance, depart on a Monday or Tuesday and return on a Saturday

Cheap flight deals from San Antonio to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 25 maaliskuu 2025.

Round-trip from

£529

One-way from

£256

Popular in

June

Cheapest in

October

Average price

£726
British Airways
  • British Airways
  • 1/9-12/9
  • 3 total stops
  • 29h 28m total
  • San Antonio to London
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8/5
  • 8/5
  • 3 total stops
  • 19h 45m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£95 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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Find flight deals from San Antonio to Heathrow

Cheapest flights from San Antonio to Heathrow
Explore the most affordable flight options available from San Antonio to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 maaliskuu 2025.

ma 1/914:40SAT - LHR
1 stop12h 20mBritish Airways
pe 12/907:45LHR - SAT
2 stops17h 08mBritish Airways
Deal found 24/3£529
ke 23/413:10SAT - LHR
1 stop17h 10mUnited Airlines
ti 29/414:05LHR - SAT
2 stops38h 54mUnited Airlines
Deal found 24/3£530
pe 15/813:06SAT - LHR
1 stop11h 34mMultiple Airlines
su 24/815:10LHR - SAT
1 stop14h 27mMultiple Airlines
Deal found 24/3£532
ke 23/409:35SAT - LHR
2 stops18h 00mAir Canada
ti 29/414:05LHR - SAT
2 stops31h 40mAir Canada
Deal found 24/3£534
ke 7/511:59SAT - LHR
1 stop13h 16mDelta
ke 14/508:40LHR - SAT
2 stops17h 46mDelta
Deal found 24/3£535
ma 21/416:04SAT - LHR
1 stop14h 11mIberia
ma 28/420:00LHR - SAT
2 stops33h 58mIberia
Deal found 24/3£539
ke 23/417:13SAT - LHR
1 stop14h 17mKLM
ti 29/409:20LHR - SAT
1 stop14h 41mKLM
Deal found 24/3£548
su 6/414:28SAT - LHR
1 stop12h 32mFinnair
su 13/408:20LHR - SAT
1 stop15h 58mFinnair
Deal found 23/3£578
ma 19/510:32SAT - LHR
1 stop14h 13mAir France
la 31/512:25LHR - SAT
1 stop16h 42mAir France
Deal found 25/3£590
to 8/511:59SAT - LHR
3 stops24h 51mScandinavian Airlines
la 17/506:40LHR - SAT
2 stops23h 41mScandinavian Airlines
Deal found 24/3£644
pe 4/416:04SAT - LHR
2 stops14h 36mAer Lingus
to 10/408:50LHR - SAT
2 stops21h 08mAer Lingus
Deal found 24/3£703
pe 15/812:07SAT - LHR
1 stop13h 08mLufthansa
su 24/812:15LHR - SAT
1 stop14h 18mLufthansa
Deal found 25/3£742

Cheapflights Fare Finder

Customise your flight search to find flights from San Antonio to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 maaliskuu 2025.
Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

San Antonio

Fly to

Heathrow

Route

Depart

Return

Price

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ma 1/9

14:40-09:00

1 stop12h 20m

London Heathrow

pe 12/9

07:45-18:53

2 stops17h 08m

£529

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ke 23/4

13:10-12:20

1 stop17h 10m

London Heathrow

ti 29/4

14:05-22:59

2 stops38h 54m

£530

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

pe 15/8

13:06-06:40

1 stop11h 34m

London Heathrow

su 24/8

15:10-23:37

1 stop14h 27m

£532

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ke 23/4

09:35-09:35

2 stops18h 00m

London Heathrow

ti 29/4

14:05-15:45

2 stops31h 40m

£534

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ke 7/5

11:59-07:15

1 stop13h 16m

London Heathrow

ke 14/5

08:40-20:26

2 stops17h 46m

£535

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ma 21/4

16:04-12:15

1 stop14h 11m

London Heathrow

ma 28/4

20:00-23:58

2 stops33h 58m

£539

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ke 23/4

17:13-13:30

1 stop14h 17m

London Heathrow

ti 29/4

09:20-18:01

1 stop14h 41m

£548

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

su 6/4

14:28-09:00

1 stop12h 32m

London Heathrow

su 13/4

08:20-18:18

1 stop15h 58m

£578

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

ma 19/5

10:32-06:45

1 stop14h 13m

London Heathrow

la 31/5

12:25-23:07

1 stop16h 42m

£590

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

to 8/5

11:59-18:50

3 stops24h 51m

London Heathrow

la 17/5

06:40-00:21

2 stops23h 41m

£644

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from San Antonio to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Antonio 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.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to London Heathrow Airport

How far ahead should I book a flight from San Antonio to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from San Antonio to Heathrow. Price data was last updated on 21 March 2025.

The price you pay for your flight from San Antonio to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Antonio to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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 SAT to LHR?

Find hourly flight availability from San Antonio to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 maaliskuu 2025.

When flying from San Antonio to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 10% versus a flight in the morning.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 25 maaliskuu 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from San Antonio to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,423 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Heathrow. 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 San Antonio to London Heathrow?

    San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly out of when you book flights from San Antonio to London Heathrow. 1 airline have flights from San Antonio to London Heathrow on a regular basis. Booking flights from San Antonio to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

  • What are the cheapest airlines flying from San Antonio to London Heathrow Airport round-trip?

    British Airways, at £529, was found to be the cheapest airline from San Antonio to London Heathrow Airport.Alternate airlines flying return to your destination include United Airlines and Air Canada. British Airways is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Antonio to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £344. Air Canada flights start at £345 while deals on Delta start at £349 one-way.

  • Can I find deals for flights from San Antonio to Heathrow that include hotel bookings?

    Yes. In addition to deals on San Antonio to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Heathrow.

  • Can I find deals for business class flights from San Antonio to Heathrow?

    Yes. Cheapflights offers flight deals from San Antonio to Heathrow 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 San Antonio to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
Hounslow
Deal
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Gatwick
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Swindon
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Winchester
Maidstone
Ipswich
Watford
Southall

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Alternative routes for San Antonio to Heathrow

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Top airline flying from San Antonio to Heathrow

Discover the top airline that operate flights from San Antonio to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 maaliskuu 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£600Average£999FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from San Antonio to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Antonio to Heathrow. 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 San Antonio to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Antonio to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from San Antonio to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from San Antonio to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from San Antonio to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on San Antonio to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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