In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What is the cheapest time of day to fly from BFS to ORD?

When flying from Belfast Intl Airport to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Belfast Intl to O'Hare Intl that include hotel bookings?

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

How can I find direct flights from Belfast Intl to O'Hare Intl?

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

Can I find deals for business class flights from Belfast Intl to O'Hare Intl?

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

£276+ Cheap Flights from Belfast Intl Airport to Chicago O'Hare Intl Airport

Cheap flight deals from Belfast Intl to O'Hare Intl

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Cheapest flights from Belfast Intl to O'Hare Intl
Explore the most affordable flight options available from Belfast Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Wed 7/1006:10 -

2 stops21h 15m

Wed 14/1019:25 -

2 stops19h 05m

Deal found 23/8£616

Thu 17/914:25 -

2 stops31h 45m

Thu 24/919:15 -

2 stops21h 35m

Deal found 20/8£625

Tue 20/1021:25 -

2 stops22h 35m

Sat 24/1016:45 -

2 stops12h 15m

Deal found 22/8£659

Mon 5/1021:35 -

2 stops23h 20m

Mon 12/1014:15 -

3 stops20h 00m

Deal found 21/8£679

Fri 9/1021:10 -

2 stops25h 43m

Mon 12/1014:15 -

3 stops20h 00m

Deal found 20/8£697

Find flight deals from Belfast Intl to O'Hare Intl

Round-trip from	£616
One-way from	£276

7/10-14/10
4 total stops
40h 20m total
Belfast to Chicago

Search Deals

10/10
3 total stops
27h 35m total
Belfast to Chicago

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast Intl Airport to Chicago O'Hare Intl Airport that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Thu 17/9

14:25-16:10

2 stops31h 45m

Chicago O'Hare Intl

Thu 24/9

19:15-22:50

2 stops21h 35m

£625

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Wed 7/10

08:15-20:41

3 stops18h 26m

Chicago O'Hare Intl

Wed 14/10

19:25-22:20

2 stops20h 55m

£632

Fastest return journey

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 20/10

21:25-14:00

2 stops22h 35m

Chicago O'Hare Intl

Sat 24/10

16:45-11:00

2 stops12h 15m

£659

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 5/10

21:35-14:55

2 stops23h 20m

Chicago O'Hare Intl

Mon 12/10

14:15-16:15

3 stops20h 00m

£679

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 9/10

21:10-16:53

2 stops25h 43m

Chicago O'Hare Intl

Mon 12/10

14:15-16:15

3 stops20h 00m

£697

Cheapest one-way

Fastest single journey

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Sat 10/10

20:15-17:50

3 stops27h 35m

£276

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Sorted by cheapest first

Best time to book a flight from Belfast Intl to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Belfast Intl with our price prediction graph.

BFS-ORD

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.

Related info for your journey

Can I find deals for flights from Belfast Intl to O'Hare Intl that include hotel bookings?
Yes. In addition to deals on Belfast Intl to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast Intl to O'Hare Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to O'Hare Intl.
Can I find deals for business class flights from Belfast Intl to O'Hare Intl?
Yes. Cheapflights offers flight deals from Belfast Intl to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from Belfast Intl Airport to Chicago O'Hare Intl Airport from £276

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Belfast Intl to O'Hare Intl

Cheapest flights from Belfast Intl to O'Hare IntlExplore the most affordable flight options available from Belfast Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Explore the most affordable flight options available from Belfast Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Best flights from Belfast Intl to O'Hare IntlDiscover carefully curated flight deals from Belfast Intl to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Discover carefully curated flight deals from Belfast Intl to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Belfast Intl to O'Hare IntlDiscover last-minute flight deals from Belfast Intl to O'Hare Intl. Data last updated 23 August 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to O'Hare Intl. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Belfast Intl to O'Hare IntlSearch for one-way flight options from Belfast Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Search for one-way flight options from Belfast Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

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Use the filters below to find and compare flights from Belfast Intl Airport to Chicago O'Hare Intl Airport that are best for you.

Best time to book a flight from Belfast Intl to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Belfast Intl with our price prediction graph.

Related info for your journey

Can I find deals for flights from Belfast Intl to O'Hare Intl that include hotel bookings?

How can I find direct flights from Belfast Intl to O'Hare Intl?

Can I find deals for business class flights from Belfast Intl to O'Hare Intl?

Travelling to a place near Chicago O'Hare Intl Airport?

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Alternative routes for Belfast Intl to O'Hare Intl

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Complete your trip

Complete your trip to O'Hare Intl by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Illinois

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Search flights from Belfast Intl to O'Hare Intl by cabin class

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Other flights to O'Hare Intl

Explore flights to O'Hare Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 23 August 2026.

Belfast Intl and O'Hare Intl flights

Browse other Belfast Intl and O'Hare Intl flight options. Last updated on 23 August 2026.

Other flights from Belfast Intl

Browse through other flights departing from Belfast Intl. Flights are based on user searches made on Cheapflights and were last updated on 23 August 2026.

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How does Cheapflights help users find flights from Belfast Intl to O'Hare Intl?

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to O'Hare Intl?

Can Cheapflights find flights from Belfast Intl to O'Hare Intl with no change fees?

Can Cheapflights notify me if prices for flights from Belfast Intl to O'Hare Intl become cheaper?

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Cheapest flights from Belfast Intl to O'Hare Intl
Explore the most affordable flight options available from Belfast Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Best flights from Belfast Intl to O'Hare Intl
Discover carefully curated flight deals from Belfast Intl to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Belfast Intl to O'Hare Intl
Discover last-minute flight deals from Belfast Intl to O'Hare Intl. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Belfast Intl to O'Hare Intl
Search for one-way flight options from Belfast Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.