Which airlines fly to Chicago?

Based on our data, the most popular airlines that fly to Chicago from Ireland are Aer Lingus, United Airlines, British Airways and Icelandair. There may also be other airline options depending on where in Ireland you’re flying from.

Aer Lingus Flights to Chicago

The most popular airline for flights to Chicago on momondo is Aer Lingus, which operates 47 flights in this direction every week. Most depart out of Dallas/Fort Worth, with the best deal for Aer Lingus flights to Chicago being €389 (return, Dublin to Chicago, momondo searches within the last 72 hours). In 1,360 Aer Lingus reviews, it is rated 7.2 by momondo users.

Icelandair Flights to Chicago

Icelandair flies to Chicago 5 times per week usually, making it a popular airline to fly with, particularly when heading to Chicago from Reykjavik Keflavik Intl. Icelandair (rating: 7.1, 562 reviews) varies in price depending on when and where you want to fly to Chicago from. The best Icelandair ticket price found on momondo to Chicago was from Dublin (€354 return).

How long does it take to fly to Chicago?

If you’re flying from a popular airport in Ireland, such as Dublin or Cork, and flying into Chicago, then you can expect flight times to average 8h and 14h 20m, respectively.

€376 Cheap Flights to Chicago in 2025/26

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Find the cheapest flights from Ireland to Chicago

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

05:10 - 13:10DUB-ORD

14h 00m1 stop

18:35 - 08:10ORD-DUB

7h 35mdirect

€388Lufthansa

Find Deal

Fri, 13 Feb - Fri, 20 Feb

09:10 - 20:05DUB-ORD

16h 55m1 stop

18:35 - 08:10ORD-DUB

7h 35mdirect

€388Lufthansa

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Wed, 26 Nov - Wed, 3 Dec

09:20 - 20:05DUB-ORD

16h 45m1 stop

18:50 - 17:45ORD-DUB

16h 55m1 stop

€389Multiple Airlines

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Thu, 6 Nov - Thu, 13 Nov

11:30 - 21:23DUB-ORD

15h 53m2 stops

17:10 - 09:50ORD-DUB

10h 40m1 stop

€391American Airlines

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Sat, 8 Nov - Sat, 15 Nov

09:00 - 19:30DUB-ORD

16h 30m1 stop

18:35 - 08:10ORD-DUB

7h 35mdirect

€398United Airlines

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Sun, 9 Nov - Sat, 15 Nov

09:00 - 15:10DUB-ORD

12h 10m1 stop

18:35 - 08:10ORD-DUB

7h 35mdirect

€399United Airlines

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Sat, 22 Nov - Sun, 30 Nov

17:55 - 17:00DUB-ORD

29h 05m1 stop

21:45 - 07:55ORD-DUB

28h 10m1 stop

€408British Airways

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Sat, 15 Nov - Thu, 27 Nov

20:40 - 17:00DUB-ORD

26h 20m1 stop

17:30 - 15:05ORD-DUB

15h 35m2 stops

€428British Airways

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Thu, 6 Nov - Sun, 16 Nov

11:30 - 20:50DUB-ORD

15h 20m2 stops

17:10 - 09:35ORD-DUB

10h 25m1 stop

€432American Airlines

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Fri, 26 Dec - Tue, 30 Dec

14:45 - 21:14SNN-ORD

12h 29m1 stop

07:25 - 06:20ORD-SNN

16h 55m1 stop

€567Aer Lingus

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Thu, 11 Dec - Thu, 18 Dec

Fly from

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 13/2

05:10-13:10

1 stop14h 00m

Chicago O'Hare Intl

Fri 20/2

18:35-08:10

Nonstop7h 35m

€388

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 26/11

09:10-20:05

1 stop16h 55m

Chicago O'Hare Intl

Wed 3/12

18:35-08:10

Nonstop7h 35m

€388

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 6/11

09:20-20:05

1 stop16h 45m

Chicago O'Hare Intl

Thu 13/11

18:50-17:45

1 stop16h 55m

€389

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 8/11

11:30-21:23

2 stops15h 53m

Chicago O'Hare Intl

Sat 15/11

17:10-09:50

1 stop10h 40m

€391

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 9/11

09:00-19:30

1 stop16h 30m

Chicago O'Hare Intl

Sat 15/11

18:35-08:10

Nonstop7h 35m

€398

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 22/11

09:00-15:10

1 stop12h 10m

Chicago O'Hare Intl

Sun 30/11

18:35-08:10

Nonstop7h 35m

€399

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 15/11

17:55-17:00

1 stop29h 05m

Chicago O'Hare Intl

Thu 27/11

21:45-07:55

1 stop28h 10m

€408

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 6/11

20:40-17:00

1 stop26h 20m

Chicago O'Hare Intl

Sun 16/11

17:30-15:05

2 stops15h 35m

€428

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 26/12

11:30-20:50

2 stops15h 20m

Chicago O'Hare Intl

Tue 30/12

17:10-09:35

1 stop10h 25m

€432

ShannonChicago

SNN - ORD

SNNORD

Shannon

Thu 11/12

14:45-21:14

1 stop12h 29m

Chicago O'Hare Intl

Thu 18/12

07:25-06:20

1 stop16h 55m

€567

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Chicago flights insights and trends

Explore insights for your Chicago flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from Ireland is in September. Flight prices, which tend to average around €418, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in September, then you should wait until January to fly from Ireland, when ticket prices are also cheap, with an average price of €439.

What is the absolute cheapest flight to Chicago?

See prices from:

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

On average, the least expensive day to fly to Chicago from Ireland is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as €631. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Sunday is €726.

What is the cheapest time of day to depart on your flight to Chicago?

In the evening is the cheapest time of day to fly from Ireland to Chicago when you can find flight prices for as low as €521. Flying to Chicago in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at midday when prices are €681 on average. Flights to Chicago from Ireland at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €518 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Ireland for as low as €460 on momondo.

Cheapest flights to Chicago

Find the cheapest flights to Chicago from your nearest city or airport

Find flights from Dublin to Chicago O'Hare Intl Airport

CHEAPEST MONTH TO FLY TO CHICAGO FROM DUBLIN	September	17% cheaper	Flying from Dublin to Chicago costs on average just €418 in September
MOST EXPENSIVE MONTH TO FLY TO CHICAGO FROM DUBLIN	July	20% more expensive	It costs about €604 for flights to Chicago from Dublin in July
MOST POPULAR MONTH TO FLY TO CHICAGO FROM DUBLIN	October	340% more users visited	More momondo users searched in flights to Chicago from Dublin in October than any other month

Cheap Chicago flight deals and tips

Summary info about Chicago flight prices, duration and airlines

Best One-Way Price	€376
Best Round-Trip Price	€388
Fastest flight time	8h 30m
Popular in	July

The best one-way flight price to Chicago from Ireland in the last 72 hours is €376 (Dublin to Chicago O'Hare Intl).

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The best round-trip flight price to Chicago from Ireland in the last 72 hours is €388 (Dublin to Chicago O'Hare Intl).

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The fastest flight to Chicago from Ireland takes 8h 30m (Dublin to Chicago O'Hare Intl).

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July has the highest demand for flights to Chicago, with a 15% price increase on average.

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Frequently asked questions about flying to Chicago

When is it best to fly to Chicago to go sightseeing?

The city of Chicago has many sights to see while visiting. Many tourists find it ideal to go sightseeing when the weather is warmer, but not blistering. Consider booking your flight to Chicago for May or June, when temperatures are a bit higher and the chance of rain is relatively low. Many travellers find it worthwhile to visit Art Institute of Chicago, Grant Park, and Magnificent Mile.

How far in advance should I book a flight to Chicago?

We recommend purchasing flights from Ireland to Chicago 62 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Chicago for €499. However, in the past 72 hours, people saw flights from Ireland for as low as €322.

Is there an alternative airport near Chicago?

Finding an alternative and possibly cheaper destination airport near Chicago is possible. If you are planning a flight to Chicago, consider booking flights to Chicago Midway Airport (14 km from Chicago city centre) or Chicago Greater Rockford Airport (126 km from Chicago city centre).

Is there a cheaper alternative to flying into Chicago?

With an average price of €186 per person, Chicago Midway Airport is the cheapest airport to fly into when planning your trip to Chicago. This price can fluctuate based on where you are flying from. momondo’s Airport-to-Airport Pricing Tool can help users find the best prices.

Are there flights to Grand Boulevard?

Yes, you can get a flight ticket to Chicago Midway if you want to reach Grand Boulevard. It is the nearest Chicago airport (11.0 km away).

What’s the closest airport to Art Institute of Chicago?

The closest airport to Art Institute of Chicago is 14.4 km away - Chicago’s Chicago Midway airport.

When did momondo last update prices for flights to Chicago?

Prices for flights to Chicago are refreshed on a daily basis.

How many operators does momondo search for flights to Chicago?

As of October 2025, there are 7 operators available to choose from for flights to Chicago.

How old do you have to be to fly to Chicago?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Chicago.

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

The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal to Chicago?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Chicago. Millions of users trust and use momondo every year so you are in good company.

Can I find flights to Chicago with flexible booking policies on momondo?

Yes. All flights to Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Chicago?

Once you have performed a search for flights to Chicago, momondo helps you find the right flight by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Chicago. 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.