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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.
BFS — ORD
16 Jul — 23 Jul1
1 adult

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.

Round-trip from

£638

Popular in

August

Cheapest in

September

Average price

£618
24/8-31/8
  • 24/8-31/8
  • 4 total stops
  • 45h 24m total
  • Belfast to Illinois
Highest demand for flights based on searches. 1% potential increase in price (£9 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Belfast Intl to Illinois

Cheapest flights from Belfast Intl to Illinois
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.

Sun 24/822:55BFS - ORD
2 stops26h 34mMultiple Airlines
Sun 31/822:15ORD - BFS
2 stops18h 50mMultiple Airlines
Deal found 10/7£638

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

Belfast Intl

Fly to

Illinois

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

£638

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Illinois
No data available for this route at this time. Please check back soon.

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.
  • Can I find deals for flights from Belfast Intl to Illinois that include hotel bookings?

    Yes. In addition to deals on Belfast Intl to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast Intl to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Illinois.

  • Can I find deals for business class flights from Belfast Intl to Illinois?

    Yes. Cheapflights offers flight deals from Belfast Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Belfast Intl Airport to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Illinois (average of £595). Flying from Belfast Intl Airport to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£478Average£590FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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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.

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