Cheap flights from Belfast Intl Airport to Illinois from £638
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast Intl to Illinois
Keep the following information in mind while searching for Belfast Intl to Illinois flight deals. Data was last updated 11 July 2025.
Find flight deals from Belfast Intl to Illinois
Cheapest flights from Belfast Intl to IllinoisExplore the most affordable flight options available from Belfast Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Explore the most affordable flight options available from Belfast Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Belfast Intl to Illinois 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, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BelfastChicago
BFS - ORD
BFSORD
Belfast Intl
Sun 24/8
22:55-19:29
2 stops26h 34m
Chicago O'Hare Intl
Sun 31/8
22:15-23:05
2 stops18h 50m
Best time to book a flight from Belfast Intl to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Belfast Intl with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast Intl Airport to Illinois
Related info for your journey
Find useful and relevant information for your journey from Belfast Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Belfast Intl to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Belfast Intl to Illinois
Discover the top airline that operate flights from Belfast Intl to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Belfast Intl to Illinois?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from Belfast Intl today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Illinois?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Belfast Intl.
Can Cheapflights find flights from Belfast Intl to Illinois with no change fees?
Need flexible booking options for your flight to Illinois from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Belfast Intl to Illinois become cheaper?
Not ready to book yet? You can track prices for flights from Belfast Intl to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.