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Cheap flights from Illinois to Belfast from $315

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 4/28. 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
1 adult, Economy, 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.
Multiple Airlines Logo
11:25 am - 11:20 pm
ORD
-
BFS
29h 55m
2 stops
Multiple Airlines Logo
8:50 am - 9:40 am
BFS
-
ORD
30h 50m
2 stops
$836Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
7:25 pm - 7:50 pm
ORD
-
BFS
18h 25m
3 stops
Multiple Airlines Logo
7:35 am - 4:00 pm
BFS
-
ORD
38h 25m
3 stops
$867Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
7:25 pm - 3:15 pm
ORD
-
BFS
13h 50m
2 stops
Multiple Airlines Logo
7:35 am - 4:00 pm
BFS
-
ORD
38h 25m
3 stops
$875Multiple Airlines
Tue, Apr 28 - Tue, May 5
British Airways Logo
9:15 pm - 2:35 pm
ORD
-
BHD
11h 20m
1 stop
British Airways Logo
8:25 pm - 3:55 pm
BHD
-
ORD
25h 30m
1 stop
$883British Airways
Sun, Sep 6 - Tue, Sep 8
British Airways Logo
9:15 pm - 5:40 pm
ORD
-
BHD
14h 25m
1 stop
British Airways Logo
8:25 pm - 3:55 pm
BHD
-
ORD
25h 30m
1 stop
$884British Airways
Sun, Sep 6 - Tue, Sep 8
American Airlines Logo
1:01 pm - 10:30 am
STL
-
BHD
15h 29m
2 stops
American Airlines Logo
11:35 am - 11:33 pm
BHD
-
STL
17h 58m
2 stops
$919American Airlines
Sun, Sep 6 - Wed, Sep 16
Delta Logo
10:55 am - 4:55 pm
STL
-
BHD
24h 00m
2 stops
Delta Logo
5:30 pm - 11:01 pm
BHD
-
STL
35h 31m
2 stops
$939Delta
Tue, Sep 8 - Wed, Sep 16
KLM Logo
1:30 pm - 9:20 am
STL
-
BHD
13h 50m
2 stops
KLM Logo
9:50 am - 11:37 pm
BHD
-
STL
19h 47m
2 stops
$969KLM
Sun, Sep 6 - Thu, Sep 17
Delta Logo
3:42 pm - 4:55 pm
STL
-
BHD
19h 13m
2 stops
Delta Logo
9:45 am - 4:55 pm
BHD
-
STL
37h 10m
2 stops
$996Delta
Tue, Sep 8 - Sun, Sep 13
KLM Logo
9:22 am - 9:20 am
MDW
-
BHD
17h 58m
2 stops
KLM Logo
5:30 pm - 6:31 pm
BHD
-
MDW
31h 01m
2 stops
$1,208KLM
Mon, Jun 1 - Wed, Jun 10

American Airlines flights from Illinois to Belfast

Our best American Airlines deals on Illinois to Belfast flight tickets
American Airlines
Sep 6
STL1:01 pmLambert-St Louis
15h 29m
2 stops
BHD10:30 amBelfast City
Sep 16
BHD11:35 amBelfast City
17h 58m
2 stops
STL11:33 pmLambert-St Louis
$919
American Airlines
May 7
ORD10:30 pmChicago O'Hare Intl
14h 15m
1 stop
BHD6:45 pmBelfast City
May 10
BHD6:30 amBelfast City
17h 00m
2 stops
ORD5:30 pmChicago O'Hare Intl
$1,045
American Airlines
Jul 22
ORD6:10 pmChicago O'Hare Intl
11h 50m
1 stop
BHD12:00 pmBelfast City
Jul 29
BHD11:35 amBelfast City
12h 00m
1 stop
ORD5:35 pmChicago O'Hare Intl
$1,088

Delta flights from Illinois to Belfast

Our best Delta deals on Illinois to Belfast flight tickets
Delta
Sep 8
STL10:55 amLambert-St Louis
24h 00m
2 stops
BHD4:55 pmBelfast City
Sep 16
BHD5:30 pmBelfast City
35h 31m
2 stops
STL11:01 pmLambert-St Louis
$939
Delta
Sep 8
STL3:42 pmLambert-St Louis
19h 13m
2 stops
BHD4:55 pmBelfast City
Sep 13
BHD9:45 amBelfast City
37h 10m
2 stops
STL4:55 pmLambert-St Louis
$996
Delta
Sep 8
STL4:13 pmLambert-St Louis
18h 42m
2 stops
BHD4:55 pmBelfast City
Sep 14
BHD5:30 pmBelfast City
29h 19m
2 stops
STL4:49 pmLambert-St Louis
$1,081

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 April 2, 2026.
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

Cheapest round-trip

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 4/28

11:25 am-11:20 pm

2 stops29h 55m

Belfast Intl

Tue 5/5

8:50 am-9:40 am

2 stops30h 50m

$836

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 4/28

7:25 pm-7:50 pm

3 stops18h 25m

Belfast Intl

Tue 5/5

7:35 am-4:00 pm

3 stops38h 25m

$867

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 4/28

7:25 pm-3:15 pm

2 stops13h 50m

Belfast Intl

Tue 5/5

7:35 am-4:00 pm

3 stops38h 25m

$875

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 9/6

9:15 pm-2:35 pm

1 stop11h 20m

Belfast City

Tue 9/8

8:25 pm-3:55 pm

1 stop25h 30m

$883

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 9/6

9:15 pm-5:40 pm

1 stop14h 25m

Belfast City

Tue 9/8

8:25 pm-3:55 pm

1 stop25h 30m

$884
Quickest round-trip

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 9/6

1:01 pm-10:30 am

2 stops15h 29m

Belfast City

Wed 9/16

11:35 am-11:33 pm

2 stops17h 58m

$919

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 9/8

10:55 am-4:55 pm

2 stops24h 00m

Belfast City

Wed 9/16

5:30 pm-11:01 pm

2 stops35h 31m

$939

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 9/6

1:30 pm-9:20 am

2 stops13h 50m

Belfast City

Thu 9/17

9:50 am-11:37 pm

2 stops19h 47m

$969

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 9/8

3:42 pm-4:55 pm

2 stops19h 13m

Belfast City

Sun 9/13

9:45 am-4:55 pm

2 stops37h 10m

$996

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 6/1

9:22 am-9:20 am

2 stops17h 58m

Belfast City

Wed 6/10

5:30 pm-6:31 pm

2 stops31h 01m

$1,208

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 airline that flies from Illinois to Belfast?

British Airways, Air France, and Delta are the most popular carriers operating from Illinois to Belfast

Cheap Illinois to Belfast flight deals and tips

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

Fastest flight time

11h 00m

Direct flights

None
The fastest flight from Illinois to Belfast takes 11h 00m
There are no direct flights from Illinois to Belfast. There are no popular flight routes from Illinois to Belfast.
Search flight deals

Frequently asked questions about flying from Illinois to Belfast

  • 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
7,841 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