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Flights to Chicago

€316 Cheap flights to Chicago

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Chicago departing on 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ireland to Chicago

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:15 - 14:15ORK  Cork-ORD Chicago O'Hare Intl
14h 00m1 stop Amsterdam Schiphol
Multiple Airlines Logo
17:10 - 14:40ORD  Chicago O'Hare Intl-ORK Cork
15h 30m1 stop Paris Charles de Gaulle
€478Multiple Airlines
Thu, 1 Oct - Thu, 8 Oct
Delta Logo
06:15 - 14:15ORK  Cork-ORD Chicago O'Hare Intl
14h 00m1 stop Amsterdam Schiphol
Delta Logo
15:20 - 14:40ORD  Chicago O'Hare Intl-ORK Cork
17h 20m2 stops Boston Logan Intl Paris Charles de Gaulle
€478Delta
Thu, 3 Sep - Mon, 7 Sep
Aer Lingus Logo
16:45 - 19:15DUB  Dublin-ORD Chicago O'Hare Intl
8h 30mdirect
Aer Lingus Logo
17:10 - 10:15ORD  Chicago O'Hare Intl-DUB Dublin
11h 05m1 stop London Heathrow
€528Aer Lingus
Fri, 23 Oct - Wed, 20 Jan
Aer Lingus Logo
11:35 - 14:00DUB  Dublin-ORD Chicago O'Hare Intl
8h 25mdirect
Aer Lingus Logo
17:00 - 09:40ORD  Chicago O'Hare Intl-DUB Dublin
10h 40m1 stop London Heathrow
€529Aer Lingus
Sat, 26 Sep - Sat, 3 Oct
Finnair Logo
11:45 - 19:51DUB  Dublin-ORD Chicago O'Hare Intl
14h 06m1 stop Charlotte Douglas
Finnair Logo
21:30 - 17:15ORD  Chicago O'Hare Intl-DUB Dublin
13h 45m1 stop Helsinki-Vantaa
€531Finnair
Fri, 9 Oct - Mon, 12 Oct
Finnair Logo
11:45 - 19:51DUB  Dublin-ORD Chicago O'Hare Intl
14h 06m1 stop Charlotte Douglas
Finnair Logo
21:30 - 17:15ORD  Chicago O'Hare Intl-DUB Dublin
13h 45m1 stop Helsinki-Vantaa
€531Finnair
Wed, 7 Oct - Tue, 13 Oct
American Airlines Logo
11:30 - 19:59DUB  Dublin-ORD Chicago O'Hare Intl
14h 29m2 stops Philadelphia Washington, D.C. Reagan-National
American Airlines Logo
21:50 - 14:20ORD  Chicago O'Hare Intl-DUB Dublin
10h 30m1 stop London Heathrow
€588American Airlines
Sat, 21 Nov - Sun, 22 Nov
American Airlines Logo
16:40 - 19:15DUB  Dublin-ORD Chicago O'Hare Intl
8h 35mdirect
American Airlines Logo
21:00 - 10:20ORD  Chicago O'Hare Intl-DUB Dublin
7h 20mdirect
€620American Airlines
Thu, 14 Jan - Mon, 18 Jan
United Airlines Logo
09:50 - 09:13DUB  Dublin-ORD Chicago O'Hare Intl
29h 23m2 stops Montreal Pierre Elliott Trudeau Intl Newark
United Airlines Logo
09:07 - 07:45ORD  Chicago O'Hare Intl-DUB Dublin
40h 38m2 stops Boston Logan Intl Montreal Pierre Elliott Trudeau Intl
€623United Airlines
Thu, 27 Aug - Sat, 29 Aug
United Airlines Logo
09:50 - 10:16DUB  Dublin-ORD Chicago O'Hare Intl
30h 26m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
09:07 - 07:45ORD  Chicago O'Hare Intl-DUB Dublin
40h 38m2 stops Boston Logan Intl Montreal Pierre Elliott Trudeau Intl
€623United Airlines
Thu, 27 Aug - Sat, 29 Aug

momondo Fare Finder

 
Locate flights to Chicago that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 13,528 searches and data was last updated on 17 August 2026.
Use the filters below to find and compare flights to Chicago that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

CorkChicago

ORK Cork - ORD Chicago O'Hare Intl

ORKORD

Cork

Thu 1/10

06:15-14:15

1 stop14h 00m

Chicago O'Hare Intl

Thu 8/10

17:10-14:40

1 stop15h 30m

€478

CorkChicago

ORK Cork - ORD Chicago O'Hare Intl

ORKORD

Cork

Thu 3/9

06:15-14:15

1 stop14h 00m

Chicago O'Hare Intl

Mon 7/9

15:20-14:40

2 stops17h 20m

€478

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Fri 23/10

16:45-19:15

Nonstop8h 30m

Chicago O'Hare Intl

Wed 20/1

17:10-10:15

1 stop11h 05m

€528

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sat 26/9

11:35-14:00

Nonstop8h 25m

Chicago O'Hare Intl

Sat 3/10

17:00-09:40

1 stop10h 40m

€529

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Fri 9/10

11:45-19:51

1 stop14h 06m

Chicago O'Hare Intl

Mon 12/10

21:30-17:15

1 stop13h 45m

€531

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Wed 7/10

11:45-19:51

1 stop14h 06m

Chicago O'Hare Intl

Tue 13/10

21:30-17:15

1 stop13h 45m

€531

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sat 21/11

11:30-19:59

2 stops14h 29m

Chicago O'Hare Intl

Sun 22/11

21:50-14:20

1 stop10h 30m

€588
Fastest return journey

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Thu 14/1

16:40-19:15

Nonstop8h 35m

Chicago O'Hare Intl

Mon 18/1

21:00-10:20

Nonstop7h 20m

€620

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Thu 27/8

09:50-09:13

2 stops29h 23m

Chicago O'Hare Intl

Sat 29/8

09:07-07:45

2 stops40h 38m

€623

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Thu 27/8

09:50-10:16

1 stop30h 26m

Chicago O'Hare Intl

Sat 29/8

09:07-07:45

2 stops40h 38m

€623

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

Chicago flights insights and trends

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

What is the cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from Ireland is in November. Flight prices, which tend to average around €411, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in November, then you should wait until December to fly from Ireland, when ticket prices are also cheap, with an average price of €472.

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 Thursday. momondo users have found tickets for Thursday departures for as low as €636. 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 €778.

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

In the afternoon is the cheapest time of day to fly from Ireland to Chicago when you can find flight prices for as low as €609. Flying to Chicago in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are €706 on average. Flights to Chicago from Ireland in the morning 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 €590 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 €496 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 DUBLINNovember28% cheaperFlying from Dublin to Chicago costs on average just €411 in November
MOST EXPENSIVE MONTH TO FLY TO CHICAGO FROM DUBLINAugust31% more expensiveIt costs about €751 for flights to Chicago from Dublin in August
MOST POPULAR MONTH TO FLY TO CHICAGO FROM DUBLINOctober237% more users visitedMore 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

€316

Best Round-Trip Price

€478

Fastest flight time

12h 37m

Popular in

August
The best one-way flight price to Chicago from Ireland in the last 5 days is €316 (Shannon to Chicago O'Hare Intl).
Search Deals
The best return flight price to Chicago from Ireland in the last 5 days is €478 (Cork to Chicago O'Hare Intl).
Search Deals
The fastest flight to Chicago from Ireland takes 12h 37m (Dublin to Chicago O'Hare Intl).
Search Deals
August has the highest demand for flights to Chicago, with a 16% price increase on average.
Search Deals

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 Magnificent Mile and Grant Park.

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

We recommend purchasing flights from Ireland to Chicago 58 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 €571. However, in the past 72 hours, people saw flights from Ireland for as low as €397.

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 Lincoln Park?

Yes, you can get a flight ticket to Chicago Midway if you want to reach Lincoln Park. It is the nearest Chicago airport (16.9 km away).

What’s the closest airport to Magnificent Mile?

The closest airport to Magnificent Mile is 15.7 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 August 2026, there are 5 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.

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Find better results for your trip to Chicago

Popular Flights to Chicago

Popular routes according to searches in the past day on momondo
Dublin to Chicago Flightsfrom €550
Shannon to Chicago Flightsfrom €570
Cork to Chicago Flightsfrom €677
Milltown (Kerry) to Chicago Flightsfrom €881