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Cheap flights from Illinois to Belfast from $313

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 11/13. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:25 pm - 9:50 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
20h 25m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
8:10 pm - 6:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
28h 05m3 stops London Luton Gdansk Rebiechowo Reykjavik Keflavik Intl
$751Multiple Airlines
Sun, Oct 4 - Wed, Oct 14
Multiple Airlines Logo
7:25 pm - 10:30 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
21h 05m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Bristol
Multiple Airlines Logo
8:10 pm - 6:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
28h 05m3 stops London Luton Gdansk Rebiechowo Reykjavik Keflavik Intl
$795Multiple Airlines
Sun, Oct 4 - Wed, Oct 14
Multiple Airlines Logo
7:25 pm - 8:55 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:10 am - 2:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
35h 05m2 stops Barcelona-El Prat Amsterdam Schiphol
$812Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
Multiple Airlines Logo
7:25 pm - 9:50 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
20h 25m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
7:35 am - 4:00 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
38h 25m3 stops Manchester Madrid Barajas Lisbon Humberto Delgado
$816Multiple Airlines
Sun, Sep 13 - Tue, Sep 29
Multiple Airlines Logo
7:25 pm - 9:10 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 45m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
9:35 am - 12:40 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
33h 05m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$822Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
7:25 pm - 8:55 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:10 am - 2:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
35h 05m2 stops Barcelona-El Prat Amsterdam Schiphol
$823Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
Multiple Airlines Logo
7:25 pm - 8:55 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:10 am - 2:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
35h 05m2 stops Barcelona-El Prat Amsterdam Schiphol
$825Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
Multiple Airlines Logo
10:25 pm - 9:10 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
16h 45m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
9:35 am - 12:40 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
33h 05m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$827Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
7:25 pm - 9:50 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
20h 25m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
7:35 am - 4:00 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
38h 25m3 stops Manchester Madrid Barajas Lisbon Humberto Delgado
$829Multiple Airlines
Sun, Sep 13 - Tue, Sep 29
Multiple Airlines Logo
7:25 pm - 8:55 pmORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:10 am - 2:15 pmBFS  Belfast Intl-ORD Chicago O'Hare Intl
35h 05m2 stops Barcelona-El Prat Amsterdam Schiphol
$830Multiple Airlines
Mon, Sep 28 - Mon, Oct 5

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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 August 17, 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

Cheapest round-trip
Quickest round-trip

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 10/4

7:25 pm-9:50 pm

2 stops20h 25m

Belfast Intl

Wed 10/14

8:10 pm-6:15 pm

3 stops28h 05m

$751

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 10/4

7:25 pm-10:30 pm

3 stops21h 05m

Belfast Intl

Wed 10/14

8:10 pm-6:15 pm

3 stops28h 05m

$795

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 9/28

7:25 pm-8:55 pm

2 stops19h 30m

Belfast Intl

Mon 10/5

9:10 am-2:15 pm

2 stops35h 05m

$812

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 9/13

7:25 pm-9:50 pm

2 stops20h 25m

Belfast Intl

Tue 9/29

7:35 am-4:00 pm

3 stops38h 25m

$816

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Wed 9/30

7:25 pm-9:10 pm

2 stops19h 45m

Belfast Intl

Wed 10/7

9:35 am-12:40 pm

2 stops33h 05m

$822

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 9/28

7:25 pm-8:55 pm

2 stops19h 30m

Belfast Intl

Mon 10/5

9:10 am-2:15 pm

2 stops35h 05m

$823

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 9/28

7:25 pm-8:55 pm

2 stops19h 30m

Belfast Intl

Mon 10/5

9:10 am-2:15 pm

2 stops35h 05m

$825

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Wed 9/30

10:25 pm-9:10 pm

2 stops16h 45m

Belfast Intl

Wed 10/7

9:35 am-12:40 pm

2 stops33h 05m

$827

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 9/13

7:25 pm-9:50 pm

2 stops20h 25m

Belfast Intl

Tue 9/29

7:35 am-4:00 pm

3 stops38h 25m

$829

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 9/28

7:25 pm-8:55 pm

2 stops19h 30m

Belfast Intl

Mon 10/5

9:10 am-2:15 pm

2 stops35h 05m

$830

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 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

Best Price Found

$313

Fastest flight time

11h 20m

Direct flights

None
The best one-way flight to Belfast Intl Airport from Illinois in the past 72 hours is $313. The best round-trip flight deal from Illinois to Belfast Intl Airport found on momondo in the last 72 hours is $751.
The fastest flight from Illinois to Belfast Intl Airport takes 11h 20m
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

Frequently asked questions about flying from Illinois to Belfast Intl Airport

  • 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 $662Free CancellationRating
6.7
8,170 reviews
Search British Airways flights

Frequently asked questions about flying from Illinois to Belfast Intl Airport

  • 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
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

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