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?

As of September 2025, there are 2 operators available to choose from 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.

$322 Cheap Flights from Illinois to Belfast in 2025/26

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Find the cheapest flights from Illinois to Belfast

Round-trip

One-way

Last minute

Cheap round-trip flights

1:26 pm - 11:10 pmSTL-BFS

27h 44m2 stops

6:45 am - 10:04 pmBFS-STL

21h 19m2 stops

$583Multiple Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

9:45 pm - 5:15 pmORD-BHD

13h 30m1 stop

10:00 am - 6:45 pmBHD-ORD

14h 45m1 stop

$632British Airways

Find Deal

Fri, Dec 5 - Tue, Dec 9

4:15 pm - 4:55 pmORD-BHD

18h 40m1 stop

6:30 am - 2:10 pmBHD-ORD

13h 40m1 stop

$682Virgin Atlantic

Find Deal

Fri, Oct 3 - Tue, Oct 7

3:45 pm - 4:50 pmORD-BHD

19h 05m2 stops

5:20 pm - 2:20 pmBHD-ORD

27h 00m1 stop

$687Delta

Find Deal

Fri, Dec 5 - Tue, Dec 9

4:15 pm - 4:55 pmORD-BHD

18h 40m1 stop

6:30 am - 9:19 pmBHD-ORD

20h 49m2 stops

$692Virgin Atlantic

Find Deal

Fri, Oct 3 - Tue, Oct 7

6:23 pm - 9:15 pmMDW-BHD

20h 52m2 stops

6:30 am - 6:25 pmBHD-MDW

17h 55m2 stops

$697Delta

Find Deal

Fri, Oct 17 - Tue, Oct 21

7:59 pm - 5:30 pmSTL-BHD

15h 31m2 stops

9:35 am - 9:29 pmBHD-STL

17h 54m2 stops

$706American Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

5:40 pm - 10:10 amORD-BHD

10h 30m1 stop

7:05 am - 5:36 pmBHD-ORD

16h 31m2 stops

$740American Airlines

Find Deal

Sat, Oct 4 - Sat, Oct 11

4:15 pm - 4:55 pmORD-BHD

18h 40m1 stop

6:30 am - 2:10 pmBHD-ORD

13h 40m1 stop

$774KLM

Find Deal

Fri, Oct 3 - Tue, Oct 7

4:15 pm - 4:55 pmORD-BHD

18h 40m1 stop

6:30 am - 5:22 pmBHD-ORD

16h 52m2 stops

$784KLM

Find Deal

Fri, Oct 3 - Tue, Oct 7

British Airways flights from Illinois to Belfast

Our best British Airways deals on Illinois to Belfast flight tickets

British Airways

Dec 5

ORD9:45 pmChicago O'Hare Intl

13h 30m

1 stop

BHD5:15 pmBelfast City

Dec 9

BHD10:00 amBelfast City

14h 45m

1 stop

ORD6:45 pmChicago O'Hare Intl

$632

Find similar

British Airways

Oct 30

ORD6:10 pmChicago O'Hare Intl

19h 40m

1 stop

BHD6:50 pmBelfast City

Nov 10

BHD2:50 pmBelfast City

29h 00m

1 stop

ORD1:50 pmChicago O'Hare Intl

$641

Find similar

British Airways

Oct 31

ORD6:10 pmChicago O'Hare Intl

11h 20m

1 stop

BHD10:30 amBelfast City

Nov 10

BHD2:50 pmBelfast City

33h 55m

1 stop

ORD6:45 pmChicago O'Hare Intl

$697

Find similar

American Airlines flights from Illinois to Belfast

Our best American Airlines deals on Illinois to Belfast flight tickets

American Airlines

Sep 29

STL7:59 pmLambert-St Louis

15h 31m

2 stops

BHD5:30 pmBelfast City

Oct 7

BHD9:35 amBelfast City

17h 54m

2 stops

STL9:29 pmLambert-St Louis

$706

Find similar

American Airlines

Oct 4

ORD5:40 pmChicago O'Hare Intl

10h 30m

1 stop

BHD10:10 amBelfast City

Oct 11

BHD7:05 amBelfast City

16h 31m

2 stops

ORD5:36 pmChicago O'Hare Intl

$740

Find similar

American Airlines

Oct 31

ORD5:11 pmChicago O'Hare Intl

16h 04m

2 stops

BHD2:15 pmBelfast City

Nov 10

BHD6:35 amBelfast City

17h 17m

2 stops

ORD5:52 pmChicago O'Hare Intl

$744

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 9/29

1:26 pm-11:10 pm

2 stops27h 44m

Belfast Intl

Tue 10/7

6:45 am-10:04 pm

2 stops21h 19m

$583

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 12/5

9:45 pm-5:15 pm

1 stop13h 30m

Belfast City

Tue 12/9

10:00 am-6:45 pm

1 stop14h 45m

$632

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-4:55 pm

1 stop18h 40m

Belfast City

Tue 10/7

6:30 am-2:10 pm

1 stop13h 40m

$682

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 12/5

3:45 pm-4:50 pm

2 stops19h 05m

Belfast City

Tue 12/9

5:20 pm-2:20 pm

1 stop27h 00m

$687

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-4:55 pm

1 stop18h 40m

Belfast City

Tue 10/7

6:30 am-9:19 pm

2 stops20h 49m

$692

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Fri 10/17

6:23 pm-9:15 pm

2 stops20h 52m

Belfast City

Tue 10/21

6:30 am-6:25 pm

2 stops17h 55m

$697

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/29

7:59 pm-5:30 pm

2 stops15h 31m

Belfast City

Tue 10/7

9:35 am-9:29 pm

2 stops17h 54m

$706

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 10/4

5:40 pm-10:10 am

1 stop10h 30m

Belfast City

Sat 10/11

7:05 am-5:36 pm

2 stops16h 31m

$740

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-4:55 pm

1 stop18h 40m

Belfast City

Tue 10/7

6:30 am-2:10 pm

1 stop13h 40m

$774

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-4:55 pm

1 stop18h 40m

Belfast City

Tue 10/7

6:30 am-5:22 pm

2 stops16h 52m

$784

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

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?
As of September 2025, there are 2 operators available to choose from 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 Airways	PriceFrom $577	Free Cancellation	Rating 6.7 7,367 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.