When did momondo last update prices for flights from Belfast Intl Airport to Illinois?

Prices for flights from Belfast Intl Airport to Illinois refresh daily.

How many operators does momondo search for flights from Belfast Intl Airport to Illinois?

The number of operators available for flights from Belfast Intl Airport to Illinois is 1 as of December 2025.

How old do you have to be to fly from Belfast Intl Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£252 Cheap Flights from Belfast Intl Airport to Illinois in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Belfast Intl Airport to Illinois

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

21:05 - 14:45

BFS

ORD

47h 40m3 stops

07:15 - 15:10

ORD

BFS

25h 55m3 stops

£524Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

21:05 - 14:45

BFS

ORD

47h 40m3 stops

21:50 - 22:00

ORD

BFS

18h 10m2 stops

£527Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

06:30 - 17:20

BFS

ORD

16h 50m2 stops

18:30 - 19:35

ORD

BFS

19h 05m2 stops

£542Multiple Airlines

Wed, 28 Jan - Wed, 4 Feb

08:20 - 09:13

BFS

ORD

30h 53m3 stops

16:05 - 16:10

ORD

BFS

18h 05m2 stops

£667Multiple Airlines

Wed, 28 Jan - Wed, 4 Feb

08:05 - 17:20

BFS

ORD

15h 15m2 stops

21:50 - 22:00

ORD

BFS

18h 10m2 stops

£751Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

momondo Fare Finder

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

Fri 30/1

21:05-14:45

3 stops47h 40m

Chicago O'Hare Intl

Fri 6/2

07:15-15:10

3 stops25h 55m

£524

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 30/1

21:05-14:45

3 stops47h 40m

Chicago O'Hare Intl

Fri 6/2

21:50-22:00

2 stops18h 10m

£527

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 28/1

06:30-17:20

2 stops16h 50m

Chicago O'Hare Intl

Wed 4/2

18:30-19:35

2 stops19h 05m

£542

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 28/1

08:20-09:13

3 stops30h 53m

Chicago O'Hare Intl

Wed 4/2

16:05-16:10

2 stops18h 05m

£667

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 30/1

08:05-17:20

2 stops15h 15m

Chicago O'Hare Intl

Fri 6/2

21:50-22:00

2 stops18h 10m

£751

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 29/1

06:30-10:35

2 stops34h 05m

£252

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 29/1

06:30-15:24

3 stops38h 54m

£282

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 29/1

06:30-15:24

3 stops38h 54m

£283

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Belfast Intl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart on your flight to Illinois is on a Friday when prices can be found for as low as £591. This is often the case because there is less demand to fly during this day of the week. Flights from Belfast Intl Airport to Illinois on a Saturday will generally be more expensive and average around £824. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Cheap Belfast Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to Illinois

Fastest flight time	12h 20m
Direct flights	None

The fastest flight from Belfast Intl Airport to Illinois takes 12h 20m

There are no direct flights from Belfast Intl Airport to Illinois. There are no popular flight routes from Belfast Intl Airport to Illinois.

Search flight deals

When did momondo last update prices for flights from Belfast Intl Airport to Illinois?
Prices for flights from Belfast Intl Airport to Illinois refresh daily.
How many operators does momondo search for flights from Belfast Intl Airport to Illinois?
The number of operators available for flights from Belfast Intl Airport to Illinois is 1 as of December 2025.
How old do you have to be to fly from Belfast Intl Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Belfast Intl Airport to Illinois

Compare and see reviews for airlines that fly from Belfast Intl Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom £485	Free Cancellation	Rating 6.7 7,583 reviews		Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Belfast.

Can I find flights from Belfast to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Belfast which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Belfast to Illinois?

momondo helps you find the best flight between Belfast and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Belfast to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Belfast. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.