What are the cheapest airlines to fly from Illinois to Belfast one-way?

£381 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Aer Lingus and Iberia, with prices starting from £439 and £466, respectively.

What is the cheapest month to book a flight from Illinois to Belfast?

Currently, January is the cheapest month in which you can book a flight from Illinois to Belfast (average of £67). Flying from Illinois to Belfast in July is currently the most expensive (average of £90). 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 are the most popular routes from Illinois to Belfast?

The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Chicago Midway - Belfast Intl.

What is the cheapest month to fly from Illinois to Belfast?

Flights from Illinois to Belfast lean towards being more expensive in June. Prices are generally better when you fly from Illinois to Belfast in December, with the cheapest ticket starting at £469.

What is the cheapest time of day to fly from IL to BFS?

When flying from Illinois to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Illinois to Belfast that include hotel bookings?

Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Illinois to Belfast?

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

Can I find deals for business class flights from Illinois to Belfast?

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

£290+ Flights from Illinois to Belfast

Cheap flight deals from Illinois to Belfast

Round-trip from	£496
One-way from	£290

Finnair
3/3-18/3
2 total stops
27h 10m total
Illinois to Belfast

Search Deals

6/3
3 total stops
43h 00m total
Illinois to Belfast

Search Deals

Find flight deals from Illinois to Belfast

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Mon 3/320:25ORD - BHD

1 stop13h 50mFinnair

Tue 18/306:35BHD - ORD

1 stop13h 20mFinnair

Deal found 21/1£496

Mon 17/218:26ORD - BHD

1 stop13h 44mBritish Airways

Mon 24/214:40BHD - ORD

1 stop34h 05mBritish Airways

Deal found 20/1£502

Mon 17/218:30ORD - BFS

2 stops19h 35mMultiple Airlines

Mon 24/207:00BFS - ORD

2 stops40h 20mMultiple Airlines

Deal found 20/1£517

Mon 3/313:52ORD - BHD

2 stops13h 13mAmerican Airlines

Tue 18/309:55BHD - ORD

1 stop14h 50mAmerican Airlines

Deal found 21/1£533

Mon 3/313:26MDW - BHD

2 stops21h 24mDelta

Tue 18/306:30BHD - MDW

2 stops20h 53mDelta

Deal found 21/1£542

Mon 28/417:40STL - BHD

2 stops17h 15mDelta

Mon 12/517:25BHD - STL

2 stops28h 33mDelta

Deal found 21/1£602

Thu 1/513:48STL - BHD

2 stops17h 27mAmerican Airlines

Tue 13/506:35BHD - STL

2 stops19h 10mAmerican Airlines

Deal found 21/1£603

Mon 3/311:35ORD - BHD

3 stops23h 45mMultiple Airlines

Tue 18/307:00BHD - ORD

2 stops17h 25mMultiple Airlines

Deal found 21/1£656

Fri 2/517:30STL - BHD

2 stops17h 25mMultiple Airlines

Wed 14/506:30BHD - STL

2 stops20h 18mMultiple Airlines

Deal found 21/1£964

Mon 14/718:15STL - BHD

2 stops17h 15mBritish Airways

Mon 21/719:30BHD - STL

2 stops26h 28mBritish Airways

Deal found 21/1£979

Fri 7/315:45STL - BFS

2 stops21h 10mMultiple Airlines

Fri 14/320:30BFS - STL

3 stops47h 25mMultiple Airlines

Deal found 21/1£1,201

Thu 6/311:15MDW - BFS

3 stops17h 50mMultiple Airlines

Thu 13/308:30BFS - MDW

3 stops30h 50mMultiple Airlines

Deal found 19/1£1,441

Best flights from Illinois to Belfast
Discover carefully curated flight deals from Illinois to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 January 2025.

Mon 3/320:25ORD - BHD

1 stop13h 50mFinnair

Tue 18/306:35BHD - ORD

1 stop13h 20mFinnair

Deal found 21/1£496

Mon 17/218:26ORD - BHD

1 stop13h 44mBritish Airways

Mon 24/214:40BHD - ORD

1 stop34h 05mBritish Airways

Deal found 20/1£502

Mon 17/218:30ORD - BFS

2 stops19h 35mMultiple Airlines

Mon 24/207:00BFS - ORD

2 stops40h 20mMultiple Airlines

Deal found 20/1£517

Mon 3/313:52ORD - BHD

2 stops13h 13mAmerican Airlines

Tue 18/309:55BHD - ORD

1 stop14h 50mAmerican Airlines

Deal found 21/1£533

Mon 3/313:26MDW - BHD

2 stops21h 24mDelta

Tue 18/306:30BHD - MDW

2 stops20h 53mDelta

Deal found 21/1£542

Mon 28/410:45STL - BHD

2 stops24h 10mDelta

Wed 14/506:30BHD - STL

2 stops20h 03mDelta

Deal found 21/1£602

Thu 1/513:48STL - BHD

2 stops17h 27mAmerican Airlines

Tue 13/506:35BHD - STL

2 stops19h 10mAmerican Airlines

Deal found 21/1£603

Mon 3/311:35ORD - BHD

3 stops23h 45mMultiple Airlines

Tue 18/307:00BHD - ORD

2 stops17h 25mMultiple Airlines

Deal found 21/1£656

Mon 14/718:15STL - BHD

2 stops17h 15mBritish Airways

Mon 21/719:30BHD - STL

2 stops26h 28mBritish Airways

Deal found 21/1£979

Fri 2/517:30STL - BHD

2 stops17h 25mMultiple Airlines

Wed 14/506:30BHD - STL

2 stops20h 18mMultiple Airlines

Deal found 21/1£964

Fri 7/315:45STL - BFS

2 stops21h 10mMultiple Airlines

Fri 14/320:30BFS - STL

3 stops47h 25mMultiple Airlines

Deal found 21/1£1,201

Thu 6/311:15MDW - BFS

3 stops17h 50mMultiple Airlines

Thu 13/308:30BFS - MDW

3 stops30h 50mMultiple Airlines

Deal found 19/1£1,441

Last-minute flights from Illinois to Belfast
Discover last-minute flight deals from Illinois to Belfast. Data last updated 22 January 2025 and is based on user searches.

Mon 17/218:26ORD - BHD

1 stop13h 44mBritish Airways

Mon 24/214:40BHD - ORD

1 stop34h 05mBritish Airways

Deal found 20/1£502

Mon 17/218:30ORD - BFS

2 stops19h 35mMultiple Airlines

Mon 24/207:00BFS - ORD

2 stops40h 20mMultiple Airlines

Deal found 20/1£517

Mon 17/205:15ORD - BHD

3 stops33h 15mMultiple Airlines

Mon 24/210:15BHD - ORD

3 stops30h 25mMultiple Airlines

Deal found 20/1£664

Thu 20/220:25ORD - BHD

1 stop14h 15mFinnair

Thu 27/206:35BHD - ORD

1 stop16h 25mFinnair

Deal found 21/1£534

Thu 20/214:08MDW - BHD

2 stops20h 42mDelta

Thu 27/206:30BHD - MDW

2 stops17h 41mDelta

Deal found 21/1£582

One-way flights from Illinois to Belfast
Search for one-way flight options from Illinois to Belfast. Find affordable one-way fares based on user searches. Data last updated 22 January 2025.

Thu 6/307:25MDW - BFS

3 stops43h 00mMultiple Airlines

Deal found 20/1£290

Thu 6/317:22ORD - BFS

3 stops33h 03mMultiple Airlines

Deal found 20/1£320

Mon 19/506:45ORD - BHD

2 stops31h 40mMultiple Airlines

Deal found 19/1£332

Mon 19/516:55ORD - BHD

1 stop14h 00mBritish Airways

Deal found 19/1£381

Sat 31/520:50ORD - BHD

2 stops14h 25mAer Lingus

Deal found 19/1£439

Sun 18/517:30ORD - BHD

1 stop12h 00mIberia

Deal found 19/1£466

Fri 23/511:15MDW - BHD

3 stops27h 10mMultiple Airlines

Deal found 20/1£500

Fri 27/617:22STL - BHD

2 stops38h 18mMultiple Airlines

Deal found 20/1£631

Fri 27/613:00STL - BHD

3 stops19h 30mBritish Airways

Deal found 20/1£886

Find flights from Illinois to Belfast within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/3

20:25-16:15

1 stop13h 50m

Belfast City

Tue 18/3

06:35-14:55

1 stop13h 20m

£496

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 17/2

18:26-14:10

1 stop13h 44m

Belfast City

Mon 24/2

14:40-18:45

1 stop34h 05m

£502

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 17/2

18:30-20:05

2 stops19h 35m

Belfast Intl

Mon 24/2

07:00-17:20

2 stops40h 20m

£517

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/3

13:52-09:05

2 stops13h 13m

Belfast City

Tue 18/3

09:55-19:45

1 stop14h 50m

£533

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 3/3

13:26-16:50

2 stops21h 24m

Belfast City

Tue 18/3

06:30-22:23

2 stops20h 53m

£542

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 28/4

10:45-16:55

2 stops24h 10m

Belfast City

Wed 14/5

06:30-20:33

2 stops20h 03m

£602

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 1/5

13:48-13:15

2 stops17h 27m

Belfast City

Tue 13/5

06:35-19:45

2 stops19h 10m

£603

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/3

11:35-17:20

3 stops23h 45m

Belfast City

Tue 18/3

07:00-19:25

2 stops17h 25m

£656

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 2/5

17:30-16:55

2 stops17h 25m

Belfast City

Wed 14/5

06:30-20:48

2 stops20h 18m

£964

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 14/7

18:15-17:30

2 stops17h 15m

Belfast City

Mon 21/7

19:30-15:58

2 stops26h 28m

£979

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 21 results

Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Illinois 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 Illinois to Belfast

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

Rainfall in Belfast by month

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast by month

If weather is an important factor for your trip to Belfast, 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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Belfast

To help decide which airline to fly from Illinois to Belfast, see what other customers have to say about British Airways, American Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,521 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

8,521 reviews

Delta

8.0

Very Good

8,521 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

8,521 reviews

Check prices

Reviews

1 / 10

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

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

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

Aer Lingus

7.1

Good

1,082 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

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

Iberia

7.0

Good

2,646 reviews

Delta

8.0

Very Good

8,521 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 are the cheapest airlines to fly from Illinois to Belfast one-way?
£381 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Aer Lingus and Iberia, with prices starting from £439 and £466, respectively.
What are the most popular routes from Illinois to Belfast?
The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Chicago Midway - Belfast Intl.
Can I find deals for flights from Illinois to Belfast that include hotel bookings?
Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Illinois to Belfast?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast.
Can I find deals for business class flights from Illinois to Belfast?
Yes. Cheapflights offers flight deals from Illinois to Belfast 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 Illinois to Belfast?
Currently, January is the cheapest month in which you can book a flight from Illinois to Belfast (average of £67). Flying from Illinois to Belfast in July is currently the most expensive (average of £90). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Illinois to Belfast

Fly with Cheapflights

How does Cheapflights help users find flights from Illinois to Belfast?

Deals for Illinois to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Illinois to Belfast with no change fees?

Need flexible booking options for your flight to Belfast from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Belfast become cheaper?

Yes! Start tracking prices for Illinois to Belfast 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 Illinois to Belfast from £290

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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Belfast

Round-trip from

One-way from

Find flight deals from Illinois to Belfast

Cheapest flights from Illinois to BelfastExplore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Find flights from Illinois to Belfast within your budget

Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Illinois with our price prediction graph.

Travel insights for flights from Illinois to Belfast

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

Rainfall in Belfast by month

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

Temperature in Belfast by month

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

Reviews of airlines servicing Belfast

To help decide which airline to fly from Illinois to Belfast, see what other customers have to say about British Airways, American Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines to fly from Illinois to Belfast one-way?

What are the most popular routes from Illinois to Belfast?

Can I find deals for flights from Illinois to Belfast that include hotel bookings?

How can I find direct flights from Illinois to Belfast?

Can I find deals for business class flights from Illinois to Belfast?

What is the cheapest month to book a flight from Illinois to Belfast?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Belfast

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Belfast?

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Can Cheapflights find flights from Illinois to Belfast with no change fees?

Can Cheapflights notify me if prices for flights from Illinois to Belfast become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.