What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Belfast Intl Airport (average of £67). Flying from Chicago O'Hare Intl Airport to Belfast Intl Airport in July is currently the most expensive (average of £90). 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.

In terms of precipitation, rainfall in Belfast Intl Airport ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast Intl Airport when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Belfast 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 16.0 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 ORD to BFS?

When flying from Chicago O'Hare Intl Airport to Belfast 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 O'Hare Intl to Belfast Intl that include hotel bookings?

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

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

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

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

Yes. Cheapflights offers flight deals from O'Hare Intl to Belfast 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.

£532+ Cheap Flights from Chicago O'Hare Intl Airport to Belfast Intl Airport

Q: How much does it cost for a return flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?

Airfare is above average for this route at the moment. Chicago O'Hare Intl Airport to Belfast Intl Airport flights typically cost between £488 and £496 in October. The cheapest return flight price found within the last 3 days was £532 on Multiple Airlines (31 Oct-10 Nov).

Cheap flight deals from O'Hare Intl to Belfast Intl

Round-trip from	£532
Popular in	June
Cheapest in	May
Average price	£493

31/10-10/11
6 total stops
67h 10m total
Chicago to Belfast

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (£27 potential increase over avg. return price).

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Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).

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Average for round-trip flights in September 2025

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Find flight deals from O'Hare Intl to Belfast Intl

Cheapest flights from O'Hare Intl to Belfast Intl
Explore the most affordable flight options available from O'Hare Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Fri 31/1021:15ORD - BFS

3 stops20h 30mMultiple Airlines

Mon 10/1122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 14/9£532

Fri 31/1021:15ORD - BFS

3 stops20h 30mMultiple Airlines

Fri 7/1121:30BFS - ORD

3 stops47h 15mMultiple Airlines

Deal found 16/9£537

Mon 29/906:30ORD - BFS

2 stops31h 55mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£557

Sat 27/908:40ORD - BFS

3 stops26h 30mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£575

Fri 26/919:25ORD - BFS

2 stops20h 55mMultiple Airlines

Wed 1/1021:05BFS - ORD

2 stops27h 10mMultiple Airlines

Deal found 15/9£588

Sun 28/906:30ORD - BFS

2 stops31h 50mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£606

Sun 28/919:25ORD - BFS

2 stops20h 55mMultiple Airlines

Wed 1/1017:20BFS - ORD

2 stops25h 15mMultiple Airlines

Deal found 15/9£613

Thu 30/1019:30ORD - BFS

2 stops12h 05mMultiple Airlines

Mon 10/1122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 14/9£619

Best flights from O'Hare Intl to Belfast Intl
Discover carefully curated flight deals from O'Hare Intl to Belfast Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Fri 31/1021:15ORD - BFS

3 stops20h 30mMultiple Airlines

Fri 7/1121:30BFS - ORD

3 stops47h 15mMultiple Airlines

Deal found 16/9£537

Sat 27/908:40ORD - BFS

3 stops26h 30mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£575

Fri 26/919:25ORD - BFS

2 stops20h 55mMultiple Airlines

Wed 1/1021:05BFS - ORD

2 stops27h 10mMultiple Airlines

Deal found 15/9£588

Sun 28/906:30ORD - BFS

2 stops31h 50mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£606

Thu 30/1019:30ORD - BFS

2 stops12h 05mMultiple Airlines

Mon 10/1122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 14/9£619

Sun 28/919:15ORD - BFS

3 stops22h 05mMultiple Airlines

Wed 1/1017:20BFS - ORD

2 stops25h 15mMultiple Airlines

Deal found 15/9£620

Thu 30/1019:30ORD - BFS

2 stops12h 05mMultiple Airlines

Thu 6/1106:15BFS - ORD

3 stops39h 00mMultiple Airlines

Deal found 14/9£629

Mon 29/912:00ORD - BFS

3 stops19h 15mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£656

Last-minute flights from O'Hare Intl to Belfast Intl
Discover last-minute flight deals from O'Hare Intl to Belfast Intl. Data last updated 17 September 2025 and is based on user searches.

Fri 26/919:25ORD - BFS

2 stops20h 55mMultiple Airlines

Wed 1/1021:05BFS - ORD

2 stops27h 10mMultiple Airlines

Deal found 15/9£588

Sat 27/908:40ORD - BFS

3 stops26h 30mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£575

Sun 28/906:30ORD - BFS

2 stops31h 50mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£606

Sun 28/919:25ORD - BFS

2 stops20h 55mMultiple Airlines

Wed 1/1017:20BFS - ORD

2 stops25h 15mMultiple Airlines

Deal found 15/9£613

Mon 29/906:30ORD - BFS

2 stops31h 55mMultiple Airlines

Thu 2/1016:25BFS - ORD

3 stops30h 05mMultiple Airlines

Deal found 15/9£557

Thu 30/1019:30ORD - BFS

2 stops12h 05mMultiple Airlines

Mon 10/1122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 14/9£619

Fri 31/1021:15ORD - BFS

3 stops20h 30mMultiple Airlines

Mon 10/1122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 14/9£532

Fri 31/1021:15ORD - BFS

3 stops20h 30mMultiple Airlines

Fri 7/1121:30BFS - ORD

3 stops47h 15mMultiple Airlines

Deal found 16/9£537

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 31/10

21:15-22:45

3 stops20h 30m

Belfast Intl

Fri 7/11

21:30-14:45

3 stops47h 15m

£537

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 27/9

08:40-17:10

3 stops26h 30m

Belfast Intl

Thu 2/10

16:25-16:30

3 stops30h 05m

£575

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 26/9

19:25-22:20

2 stops20h 55m

Belfast Intl

Wed 1/10

21:05-18:15

2 stops27h 10m

£588

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 28/9

06:30-20:20

2 stops31h 50m

Belfast Intl

Thu 2/10

16:25-16:30

3 stops30h 05m

£606

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 30/10

19:30-12:35

2 stops12h 05m

Belfast Intl

Mon 10/11

22:20-15:00

3 stops46h 40m

£619

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 28/9

19:15-23:20

3 stops22h 05m

Belfast Intl

Wed 1/10

17:20-12:35

2 stops25h 15m

£620

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 30/10

19:30-12:35

2 stops12h 05m

Belfast Intl

Thu 6/11

06:15-15:15

3 stops39h 00m

£629

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 29/9

12:00-13:15

3 stops19h 15m

Belfast Intl

Thu 2/10

16:25-16:30

3 stops30h 05m

£656

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from O'Hare 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 Chicago O'Hare Intl Airport to Belfast Intl Airport

How much does it cost for a return flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?

Related info for your journey

Can I find deals for flights from O'Hare Intl to Belfast Intl that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to Belfast Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to Belfast Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Belfast Intl.
Can I find deals for business class flights from O'Hare Intl to Belfast Intl?
Yes. Cheapflights offers flight deals from O'Hare Intl to Belfast 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.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Belfast Intl Airport (average of £67). Flying from Chicago O'Hare Intl Airport to Belfast Intl Airport in July is currently the most expensive (average of £90). 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.

See more FAQs

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Dungannon

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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 Belfast Intl from O'Hare Intl.

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Cheap flights from Chicago O'Hare Intl Airport to Belfast Intl Airport from £532

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from O'Hare Intl to Belfast Intl

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from O'Hare Intl to Belfast Intl

Cheapest flights from O'Hare Intl to Belfast IntlExplore the most affordable flight options available from O'Hare Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Explore the most affordable flight options available from O'Hare Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Belfast Intl Airport

How much does it cost for a return flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Belfast Intl. 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 O'Hare Intl to Belfast Intl that include hotel bookings?

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

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

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Belfast Intl Airport?

Travelling to a place near Belfast Intl Airport?

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.

Other flights to Belfast Intl

Explore flights to Belfast Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 September 2025.

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

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

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

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

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Cheapest flights from O'Hare Intl to Belfast Intl
Explore the most affordable flight options available from O'Hare Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.