£527 Find Cheap Flights from Belfast Intl Airport to Illinois

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast Intl to Illinois departing on 15/9. 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

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap Flights from Belfast Intl to Illinois

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast Intl 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 Intl to Illinois

Mon, 15 Sep - Mon, 22 Sep
 Logo
08:15 - 18:43BFS-ORD
40h 28m2 stops
 Logo
19:25 - 22:30ORD-BFS
21h 05m2 stops
Fri, 19 Sep - Fri, 26 Sep
 Logo
08:35 - 15:04BFS-ORD
36h 29m2 stops
 Logo
13:03 - 22:20ORD-BFS
27h 17m2 stops
Fri, 19 Sep - Fri, 26 Sep
 Logo
08:35 - 09:51BFS-ORD
31h 16m3 stops
 Logo
07:15 - 22:20ORD-BFS
33h 05m2 stops
Fri, 19 Sep - Fri, 26 Sep
 Logo
08:35 - 09:51BFS-ORD
31h 16m3 stops
 Logo
05:05 - 22:20ORD-BFS
35h 15m3 stops
Mon, 22 Sep - Mon, 29 Sep
 Logo
07:00 - 17:00BFS-ORD
16h 00m1 stop
 Logo
21:15 - 20:35ORD-BFS
17h 20m1 stop
Thu, 3 Jul - Thu, 10 Jul
 Logo
06:00 - 13:13BFS-ORD
37h 13m2 stops
 Logo
19:25 - 16:40ORD-BFS
15h 15m2 stops
Tue, 15 Jul - Tue, 22 Jul
 Logo
05:55 - 22:05BFS-ORD
22h 10m2 stops
 Logo
19:25 - 15:00ORD-BFS
13h 35m2 stops
Tue, 15 Jul - Tue, 22 Jul
 Logo
05:55 - 18:53BFS-ORD
42h 58m3 stops
 Logo
19:25 - 15:00ORD-BFS
13h 35m2 stops
Thu, 3 Jul - Thu, 10 Jul
 Logo
06:00 - 09:52BFS-ORD
33h 52m3 stops
 Logo
19:25 - 16:40ORD-BFS
15h 15m2 stops
Sat, 13 Sep - Sat, 20 Sep
 Logo
06:00 - 15:55BFS-ORD
15h 55m1 stop
 Logo
20:40 - 23:25ORD-BFS
20h 45m1 stop
Useful Info

KAYAK's insights & trends for Belfast Intl to Illinois flights

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

How long does a flight from Belfast Intl Airport to Illinois take?

The duration of a flight to Illinois depends on your arrival airport. The shortest route to Illinois from Belfast Intl Airport is to Chicago, which takes 22h 10m.


Good to know - Cheap tickets from Belfast Intl Airport to Illinois

Low seasonSeptember
High seasonOctober
Cheapest flight£527
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly (6% more expensive on average)
Flight from Belfast Intl Airport to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Belfast Intl Airport 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 Intl Airport to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belfast Intl Airport 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 Intl Airport 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 Intl Airport 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 Intl Airport 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 Intl Airport to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when retur flights cost £870 on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is £870.

Top airline flying from Belfast Intl 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 Intl 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.
6.6
British AirwaysOverall score based on 7008 reviews
6.4Entertainment
6.8Boarding
6.3Food
7.6Crew
6.7Comfort
Airline reviews

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

6.0 GoodPhilip, Jun 2025LHR - BWI
Read more British Airways reviews

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.