£299 Find Cheap Flights from Belfast Intl Airport 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 Intl to Illinois departing on 15/10. 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
Travellers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 29% 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.

Flight Deals
Booking Insights
Flight Deals

Book Cheap Belfast Intl 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 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

Tue, 2 Jun - Wed, 17 Jun
Multiple Airlines Logo
22:30 - 13:05
BFS
-
ORD
44h 35m
3 stops
Multiple Airlines Logo
09:55 - 17:05
ORD
-
BFS
25h 10m
2 stops
£641Multiple Airlines
Thu, 4 Jun - Mon, 8 Jun
Multiple Airlines Logo
10:15 - 16:00
BFS
-
ORD
35h 45m
2 stops
Multiple Airlines Logo
16:37 - 20:40
ORD
-
BFS
22h 03m
2 stops
£689Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
08:20 - 13:10
BFS
-
ORD
34h 50m
3 stops
Multiple Airlines Logo
07:25 - 22:40
ORD
-
BFS
33h 15m
3 stops
£797Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
06:55 - 13:10
BFS
-
ORD
36h 15m
3 stops
Multiple Airlines Logo
19:25 - 17:10
ORD
-
BFS
15h 45m
2 stops
£811Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
07:40 - 11:50
BFS
-
ORD
34h 10m
2 stops
Multiple Airlines Logo
19:25 - 17:10
ORD
-
BFS
15h 45m
2 stops
£816Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
08:20 - 13:10
BFS
-
ORD
34h 50m
3 stops
Multiple Airlines Logo
15:45 - 16:45
ORD
-
BFS
19h 00m
2 stops
£831Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
06:55 - 13:10
BFS
-
ORD
36h 15m
3 stops
Multiple Airlines Logo
15:45 - 16:45
ORD
-
BFS
19h 00m
2 stops
£849Multiple Airlines
Tue, 2 Jun - Wed, 17 Jun
Multiple Airlines Logo
06:15 - 21:25
BFS
-
ORD
21h 10m
2 stops
Multiple Airlines Logo
22:25 - 20:40
ORD
-
BFS
16h 15m
2 stops
£855Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
06:55 - 16:59
BFS
-
ORD
16h 04m
2 stops
Multiple Airlines Logo
19:25 - 17:10
ORD
-
BFS
15h 45m
2 stops
£858Multiple Airlines
Sat, 13 Jun - Sat, 20 Jun
Multiple Airlines Logo
06:00 - 11:50
BFS
-
ORD
35h 50m
2 stops
Multiple Airlines Logo
19:25 - 17:10
ORD
-
BFS
15h 45m
2 stops
£860Multiple Airlines
Booking Insights

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 16h 30m.

Find deals

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

Cheapest flight£299
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.

Reviews of the 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.
6.7
British AirwaysOverall score based on 7940 reviews
7.7Crew
6.4Food
6.9Boarding
6.4Entertainment
6.8Comfort
Airline reviews

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

10.0 ExcellentEric, Apr 2026
LHR - IAD
Read more British Airways reviews

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

OK, except for a cabin attendant's lack of attention.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

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

Information on your arrival and departure airports

Belfast Intl Airport (BFS)