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Cheap flights from Illinois to Belfast from $402

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Belfast departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
6:44 pm - 2:15 pmSTL-BHD
13h 31m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$620British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
British Airways Logo
6:44 pm - 2:15 pmSTL-BHD
13h 31m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$621British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
American Airlines Logo
2:36 pm - 10:40 amORD-BHD
15h 04m2 stops
American Airlines Logo
6:35 am - 4:25 pmBHD-ORD
14h 50m1 stop
$643American Airlines
Find Deal
Mon, Mar 9 - Wed, Mar 18
Delta Logo
1:00 pm - 4:50 pmMDW-BHD
22h 50m2 stops
Delta Logo
6:30 am - 6:34 pmBHD-MDW
17h 04m2 stops
$676Delta
Find Deal
Mon, Mar 9 - Wed, Mar 18
American Airlines Logo
8:35 pm - 8:15 pmORD-BHD
17h 40m1 stop
American Airlines Logo
9:10 am - 3:25 pmBHD-ORD
12h 15m1 stop
$688American Airlines
Find Deal
Sun, Dec 7 - Sun, Dec 14
Virgin Atlantic Logo
4:25 pm - 9:00 pmORD-BHD
22h 35m1 stop
Virgin Atlantic Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$709Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
4:25 pm - 4:50 pmORD-BHD
18h 25m1 stop
Delta Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$710Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Virgin Atlantic Logo
10:10 am - 9:20 pmORD-BHD
29h 10m2 stops
Virgin Atlantic Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$738Virgin Atlantic
Find Deal
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
4:50 pm - 4:45 pmORD-BHD
18h 55m2 stops
Multiple Airlines Logo
7:25 am - 10:43 pmBHD-ORD
44h 18m3 stops
$821Multiple Airlines
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Mon, Mar 9 - Wed, Mar 18
Multiple Airlines Logo
7:25 pm - 9:00 pmORD-BFS
19h 35m2 stops
Multiple Airlines Logo
9:15 am - 4:00 pmBFS-ORD
36h 45m3 stops
$821Multiple Airlines
Find Deal
Fri, May 1 - Tue, May 5

British Airways flights from Illinois to Belfast

Our best British Airways deals on Illinois to Belfast flight tickets
British Airways
Jan 12
STL6:44 pmLambert-St Louis
13h 31m
2 stops
BHD2:15 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$620
Find similar
British Airways
Jan 12
STL6:44 pmLambert-St Louis
13h 31m
2 stops
BHD2:15 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$621
Find similar
British Airways
Jan 12
STL6:44 pmLambert-St Louis
15h 21m
2 stops
BHD4:05 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$622
Find similar

American Airlines flights from Illinois to Belfast

Our best American Airlines deals on Illinois to Belfast flight tickets
American Airlines
Mar 9
ORD2:36 pmChicago O'Hare Intl
15h 04m
2 stops
BHD10:40 amBelfast City
Mar 18
BHD6:35 amBelfast City
14h 50m
1 stop
ORD4:25 pmChicago O'Hare Intl
$643
Find similar
American Airlines
Dec 7
ORD8:35 pmChicago O'Hare Intl
17h 40m
1 stop
BHD8:15 pmBelfast City
Dec 14
BHD9:10 amBelfast City
12h 15m
1 stop
ORD3:25 pmChicago O'Hare Intl
$688
Find similar
American Airlines
Dec 7
ORD6:35 pmChicago O'Hare Intl
19h 40m
1 stop
BHD8:15 pmBelfast City
Dec 14
BHD6:30 amBelfast City
17h 09m
2 stops
ORD5:39 pmChicago O'Hare Intl
$698
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Belfast 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, momondo users made 832,500 searches. Data last updated November 10, 2025.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$620

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$621

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/9

2:36 pm-10:40 am

2 stops15h 04m

Belfast City

Wed 3/18

6:35 am-4:25 pm

1 stop14h 50m

$643

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 3/9

1:00 pm-4:50 pm

2 stops22h 50m

Belfast City

Wed 3/18

6:30 am-6:34 pm

2 stops17h 04m

$676

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 12/7

8:35 pm-8:15 pm

1 stop17h 40m

Belfast City

Sun 12/14

9:10 am-3:25 pm

1 stop12h 15m

$688

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

4:25 pm-9:00 pm

1 stop22h 35m

Belfast City

Sun 12/7

6:30 am-2:20 pm

1 stop13h 50m

$709

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

4:25 pm-4:50 pm

1 stop18h 25m

Belfast City

Sun 12/7

6:30 am-2:20 pm

1 stop13h 50m

$710

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 4/3

10:10 am-9:20 pm

2 stops29h 10m

Belfast City

Tue 4/7

6:30 am-2:20 pm

1 stop13h 50m

$738

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/9

4:50 pm-4:45 pm

2 stops18h 55m

Belfast City

Wed 3/18

7:25 am-10:43 pm

3 stops44h 18m

$821

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 5/1

7:25 pm-9:00 pm

2 stops19h 35m

Belfast Intl

Tue 5/5

9:15 am-4:00 pm

3 stops36h 45m

$821

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from Illinois to Belfast

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Belfast?

The cheapest day to depart from Illinois to Belfast is on a Wednesday when prices can be found for as low as $649. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Belfast for around $938.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest Illinois to Belfast flights are usually those with departure times in the evening. Our users have found flights to Belfast in the evening for as low as $769. Try not to purchase tickets in the afternoon because they tend to be around $804. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Illinois to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Belfast

Direct flights

None
There are no direct flights from Illinois to Belfast. There are no popular flight routes from Illinois to Belfast.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Belfast?

    Prices for flights from Illinois to Belfast are refreshed on a daily basis.

  • How many operators does momondo search for flights from Illinois to Belfast?

  • How old do you have to be to fly from Illinois to Belfast?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents you'll need for your trip to Belfast may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Illinois to Belfast

Compare and see reviews for airlines that fly from Illinois to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $577Free CancellationRating
6.7
7,510 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Belfast?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Belfast for you.

Can I find flights from Illinois to Belfast with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Belfast flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Belfast?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Illinois.

I’m not ready to book a flight from Illinois to Belfast right now. Can momondo alert me if prices change?

Price alerts on flights to Belfast from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport