Latest deals
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to Belfast from $237

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 4/26. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 pm - 1:25 pm
ORD
-
BFS
12h 55m
2 stops
Multiple Airlines Logo
6:00 am - 5:20 pm
BFS
-
ORD
17h 20m
2 stops
$604Multiple Airlines
Tue, Mar 3 - Sat, Mar 7
Multiple Airlines Logo
6:30 pm - 1:25 pm
ORD
-
BFS
12h 55m
2 stops
Multiple Airlines Logo
6:30 am - 5:20 pm
BFS
-
ORD
16h 50m
2 stops
$637Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
7:15 am - 1:25 pm
ORD
-
BFS
24h 10m
3 stops
Multiple Airlines Logo
10:25 pm - 6:25 pm
BFS
-
ORD
26h 00m
2 stops
$710Multiple Airlines
Tue, Mar 3 - Sat, Mar 7
Multiple Airlines Logo
12:50 pm - 4:00 pm
ORD
-
BFS
21h 10m
3 stops
Multiple Airlines Logo
5:45 am - 2:45 pm
BFS
-
ORD
39h 00m
3 stops
$724Multiple Airlines
Tue, Mar 3 - Sat, Mar 7
Multiple Airlines Logo
7:30 pm - 4:00 pm
ORD
-
BFS
15h 30m
2 stops
Multiple Airlines Logo
6:00 pm - 9:00 pm
BFS
-
ORD
32h 00m
3 stops
$736Multiple Airlines
Tue, Mar 10 - Fri, Mar 13
Multiple Airlines Logo
6:30 pm - 1:25 pm
ORD
-
BFS
12h 55m
2 stops
Multiple Airlines Logo
8:35 am - 12:40 am
BFS
-
ORD
46h 05m
3 stops
$798Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
3:35 pm - 1:25 pm
ORD
-
BFS
16h 50m
3 stops
Multiple Airlines Logo
6:00 pm - 9:00 pm
BFS
-
ORD
32h 00m
3 stops
$802Multiple Airlines
Tue, Mar 10 - Fri, Mar 13
Multiple Airlines Logo
6:51 pm - 8:10 pm
ORD
-
BFS
19h 19m
3 stops
Multiple Airlines Logo
8:35 am - 12:40 am
BFS
-
ORD
46h 05m
3 stops
$886Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
12:50 pm - 10:00 pm
ORD
-
BFS
28h 10m
3 stops
Multiple Airlines Logo
7:55 pm - 7:50 pm
BFS
-
ORD
29h 55m
3 stops
$933Multiple Airlines
Fri, Mar 27 - Fri, Apr 3
Multiple Airlines Logo
4:50 pm - 10:00 pm
ORD
-
BFS
24h 10m
2 stops
Multiple Airlines Logo
7:55 pm - 7:50 pm
BFS
-
ORD
29h 55m
3 stops
$1,114Multiple Airlines
Fri, Mar 27 - Fri, Apr 3

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Belfast Intl Airport 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 February 14, 2026.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/3

6:30 pm-1:25 pm

2 stops12h 55m

Belfast Intl

Sat 3/7

6:00 am-5:20 pm

2 stops17h 20m

$604

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 2/24

6:30 pm-1:25 pm

2 stops12h 55m

Belfast Intl

Tue 3/3

6:30 am-5:20 pm

2 stops16h 50m

$637

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/3

7:15 am-1:25 pm

3 stops24h 10m

Belfast Intl

Sat 3/7

10:25 pm-6:25 pm

2 stops26h 00m

$710

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/3

12:50 pm-4:00 pm

3 stops21h 10m

Belfast Intl

Sat 3/7

5:45 am-2:45 pm

3 stops39h 00m

$724

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/10

7:30 pm-4:00 pm

2 stops15h 30m

Belfast Intl

Fri 3/13

6:00 pm-9:00 pm

3 stops32h 00m

$736

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 2/24

6:30 pm-1:25 pm

2 stops12h 55m

Belfast Intl

Tue 3/3

8:35 am-12:40 am

3 stops46h 05m

$798

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/10

3:35 pm-1:25 pm

3 stops16h 50m

Belfast Intl

Fri 3/13

6:00 pm-9:00 pm

3 stops32h 00m

$802

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 2/24

6:51 pm-8:10 pm

3 stops19h 19m

Belfast Intl

Tue 3/3

8:35 am-12:40 am

3 stops46h 05m

$886

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 3/27

12:50 pm-10:00 pm

3 stops28h 10m

Belfast Intl

Fri 4/3

7:55 pm-7:50 pm

3 stops29h 55m

$933

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 3/27

4:50 pm-10:00 pm

2 stops24h 10m

Belfast Intl

Fri 4/3

7:55 pm-7:50 pm

3 stops29h 55m

$1,114

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Cheap Illinois to Belfast Intl Airport flight deals and tips

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

Fastest flight time

14h 10m

Direct flights

None
The fastest flight from Illinois to Belfast Intl Airport takes 14h 10m
There are no direct flights from Illinois to Belfast Intl Airport. There are no popular flight routes from Illinois to Belfast Intl Airport.
Search flight deals

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

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

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

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

    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 Intl Airport.

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

    The travel and health documents you'll need for your trip to Belfast Intl Airport 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 Intl Airport. 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 Intl Airport

Compare and see reviews for airlines that fly from Illinois to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $577Free CancellationRating
6.7
7,739 reviews
Search British Airways flights

  • How do I get Price Alerts for flights from Illinois to Belfast Intl Airport?

    Price Alerts will notify you by email when the price for flights to Belfast Intl Airport from Illinois decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Illinois to Belfast Intl Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Cookstown
Ballymena
Newry
Dungannon

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Belfast. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Illinois to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Illinois and Belfast by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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.

An easier way to manage your Belfast Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 3/16
Mon 3/23
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $392
Flights to London Gatwick Airportfrom $371
Flights to London City Airportfrom $464
Flights to London Stansted Airportfrom $341
Flights to London Luton Airportfrom $341
Flights to Glasgow Intl Airportfrom $425
Flights to London Southend Airportfrom $452
Flights to Belfast City Airportfrom $539