£515 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 21/12. 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
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Booking Insights
Flights 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, 7 Oct - Sat, 11 Oct
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07:00 - 21:15BFS-ORD
44h 15m2 stops
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19:25 - 21:30ORD-BFS
20h 05m2 stops
Sun, 14 Sep - Sun, 21 Sep
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09:55 - 21:15BFS-ORD
17h 20m2 stops
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19:25 - 20:20ORD-BFS
18h 55m2 stops
Sun, 7 Sep - Sun, 7 Sep
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07:15 - 19:00BFS-ORD
17h 45m2 stops
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21:15 - 22:20ORD-BFS
19h 05m2 stops
Tue, 7 Oct - Sat, 11 Oct
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19:55 - 12:35BFS-ORD
46h 40m3 stops
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15:50 - 22:30ORD-BFS
24h 40m2 stops
Tue, 7 Oct - Sat, 11 Oct
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19:55 - 12:35BFS-ORD
46h 40m3 stops
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10:40 - 22:30ORD-BFS
29h 50m3 stops
Sun, 14 Sep - Sun, 21 Sep
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06:10 - 09:18BFS-ORD
33h 08m3 stops
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18:00 - 20:20ORD-BFS
20h 20m2 stops
Tue, 7 Oct - Sat, 11 Oct
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06:15 - 13:50BFS-ORD
13h 35m1 stop
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06:40 - 09:25ORD-BFS
20h 45m2 stops
Sun, 14 Sep - Sun, 21 Sep
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06:10 - 09:18BFS-ORD
33h 08m3 stops
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10:40 - 10:30ORD-BFS
17h 50m3 stops
Tue, 7 Oct - Sat, 11 Oct
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07:00 - 17:20BFS-ORD
16h 20m1 stop
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21:25 - 21:30ORD-BFS
18h 05m1 stop
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 17h 20m.


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

Low seasonSeptember
Cheapest flight£515
Best time to beat the crowds (24% less expensive on average)
Most popular time to fly and prices are also 24% lower 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.

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.
6.6
British AirwaysOverall score based on 7222 reviews
6.7Comfort
6.9Boarding
6.3Food
7.6Crew
6.4Entertainment
Airline reviews

Everything about the flight check-in was smooth no line the plane is clean and bathroom

10.0 ExcellentAnonymous, Jul 2025LHR - BWI
Read more British Airways reviews

Everything about the flight check-in was smooth no line the plane is clean and bathroom

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

I was put into business class. Wow! My flight attendant was great! The food amazing’

The gate at London Gatwick had confusing signs for the different zones and the staff seemed harried because people didn't know when it was their turn to come to the desk. Plus, with there were too many carry-on bag travelers, myself included. The charge scheme for checking bags is frustrating. If you travel light, you want the freedom to leave as soon as you deplane. When you are forced to gate-check your bag simply because the flight is fully booked, you lose whatever time you'd hoped to save because you're still stuck waiting for your bag to come off the conveyor belt.

Not so good with their baggage handling as they damaged one of my check in luggage

All went well on the flight, not happy of course with having to pay for a seat and in hold luggage of £50

We never made it onto this flight due to BA's lackluster organisation.

The air hostess were good, cheerful, but I didn't like the boarding. My son and I initially bought our flight tickets, making sure it included 1 luggage and a carry on. Tickets were purchased for British airlines, but we were merged with American Airlines. At checking in our languages, we were told, we don't have luggage prepaid so we had to pay extra $125 each and almost £60 on our way back. I think that's unfair.

Economy seats are so small and compacted so close together that comfort is negatively affected, especially on long flights. However that is due to aircraft design, not anything the airline can do about it.

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

Information on your arrival and departure airports

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