£348 Find Cheap Flights from Belfast to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to Illinois departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Illinois, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Flight Deals
Booking Insights
Flight Deals

Book Cheap Belfast to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Belfast to Illinois

Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
09:50 - 18:15
BFS
-
ORD
38h 25m
2 stops
Multiple Airlines Logo
19:25 - 23:10
ORD
-
BFS
21h 45m
2 stops
£514Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
14:20 - 18:15
BHD
-
ORD
33h 55m
2 stops
Multiple Airlines Logo
19:25 - 20:30
ORD
-
BHD
19h 05m
2 stops
£588Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
07:00 - 17:35
BFS
-
ORD
16h 35m
1 stop
Multiple Airlines Logo
21:15 - 20:15
ORD
-
BFS
17h 00m
1 stop
£630Multiple Airlines
Mon, 27 Apr - Mon, 4 May
American Airlines Logo
06:30 - 13:50
BHD
-
ORD
13h 20m
1 stop
American Airlines Logo
19:05 - 12:55
ORD
-
BHD
11h 50m
1 stop
£661American Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
09:50 - 21:29
BHD
-
ORD
17h 39m
2 stops
Multiple Airlines Logo
16:50 - 16:55
ORD
-
BHD
18h 05m
1 stop
£665Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
10:05 - 10:23
BFS
-
ORD
30h 18m
3 stops
Multiple Airlines Logo
19:25 - 21:55
ORD
-
BFS
20h 30m
3 stops
£671Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
British Airways Logo
11:35 - 07:59
BHD
-
ORD
26h 24m
2 stops
British Airways Logo
10:10 - 08:50
ORD
-
BHD
16h 40m
2 stops
£672British Airways
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
10:05 - 10:23
BFS
-
ORD
30h 18m
3 stops
Multiple Airlines Logo
19:25 - 21:00
ORD
-
BFS
19h 35m
2 stops
£677Multiple Airlines
Mon, 27 Apr - Mon, 4 May
KLM Logo
17:30 - 14:15
BHD
-
ORD
26h 45m
1 stop
KLM Logo
11:08 - 09:20
ORD
-
BHD
16h 12m
2 stops
£677KLM
Wed, 15 Apr - Wed, 22 Apr
British Airways Logo
11:35 - 17:35
BHD
-
ORD
12h 00m
1 stop
British Airways Logo
21:15 - 16:15
ORD
-
BHD
13h 00m
1 stop
£681British Airways
Booking Insights

KAYAK's insights & trends for Belfast to Illinois flights

Get data-powered insights and trends into flights from Belfast to Illinois to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Belfast to Illinois?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from Belfast to Illinois were found on American Airlines (£661) and British Airways (£672).

Good to know - Cheap tickets from Belfast to Illinois

Cheapest flight£348
Flight from Belfast City Airport to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Belfast to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Belfast to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Belfast to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belfast to Illinois is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Belfast to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Belfast to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Belfast to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Belfast to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Belfast to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Belfast to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
British AirwaysOverall score based on 7805 reviews
6.8Comfort
6.4Entertainment
6.4Food
6.9Boarding
7.6Crew
Airline reviews

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

6.0 GoodAnonymous, Mar 2026
LHR - LAX
Read more British Airways reviews

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Everything you need to know for your flight from Belfast to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.