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Flights to Chicago

€317 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 9/9. 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.
Delta Logo
05:45 - 14:25
ORK
-
ORD
14h 40m
1 stop
Delta Logo
17:45 - 15:00
ORD
-
ORK
15h 15m
2 stops
€461Delta
Thu, 5 Nov - Sun, 8 Nov
Delta Logo
05:45 - 18:40
ORK
-
ORD
18h 55m
2 stops
Delta Logo
17:45 - 15:00
ORD
-
ORK
15h 15m
2 stops
€465Delta
Thu, 5 Nov - Sun, 8 Nov
Delta Logo
05:45 - 18:37
ORK
-
MDW
18h 52m
2 stops
Delta Logo
09:55 - 10:40
MDW
-
ORK
18h 45m
2 stops
€470Delta
Thu, 5 Nov - Sun, 8 Nov
KLM Logo
13:05 - 21:52
SNN
-
ORD
14h 47m
1 stop
KLM Logo
10:25 - 11:10
ORD
-
SNN
18h 45m
1 stop
€536KLM
Thu, 3 Sep - Thu, 10 Sep
Multiple Airlines Logo
08:50 - 20:12
DUB
-
ORD
17h 22m
2 stops
Multiple Airlines Logo
10:40 - 08:15
ORD
-
DUB
15h 35m
2 stops
€541Multiple Airlines
Wed, 23 Sep - Fri, 2 Oct
Multiple Airlines Logo
08:50 - 20:12
DUB
-
ORD
17h 22m
2 stops
Multiple Airlines Logo
08:45 - 08:15
ORD
-
DUB
17h 30m
2 stops
€542Multiple Airlines
Wed, 23 Sep - Fri, 2 Oct
United Airlines Logo
09:20 - 14:05
DUB
-
ORD
10h 45m
1 stop
United Airlines Logo
20:20 - 09:45
ORD
-
DUB
7h 25mdirect
€544United Airlines
Sat, 12 Sep - Mon, 5 Oct
United Airlines Logo
09:30 - 11:50
SNN
-
ORD
8h 20mdirect
United Airlines Logo
16:00 - 10:15
ORD
-
SNN
12h 15m
2 stops
€545United Airlines
Wed, 2 Sep - Wed, 23 Sep
Icelandair Logo
14:15 - 18:15
DUB
-
ORD
10h 00m
1 stop
Icelandair Logo
18:30 - 10:15
ORD
-
DUB
9h 45m
1 stop
€553Icelandair
Tue, 18 Aug - Mon, 21 Dec
KLM Logo
13:05 - 16:15
SNN
-
MDW
33h 10m
2 stops
KLM Logo
12:41 - 11:10
MDW
-
SNN
16h 29m
2 stops
€940KLM
Tue, 7 Jul - Tue, 14 Jul

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 June 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 - ORD

ORKORD

Cork

Thu 5/11

05:45-14:25

1 stop14h 40m

Chicago O'Hare Intl

Sun 8/11

17:45-15:00

2 stops15h 15m

€461

CorkChicago

ORK - ORD

ORKORD

Cork

Thu 5/11

05:45-18:40

2 stops18h 55m

Chicago O'Hare Intl

Sun 8/11

17:45-15:00

2 stops15h 15m

€465

CorkChicago

ORK - MDW

ORKMDW

Cork

Thu 5/11

05:45-18:37

2 stops18h 52m

Chicago Midway

Sun 8/11

09:55-10:40

2 stops18h 45m

€470

ShannonChicago

SNN - ORD

SNNORD

Shannon

Thu 3/9

13:05-21:52

1 stop14h 47m

Chicago O'Hare Intl

Thu 10/9

10:25-11:10

1 stop18h 45m

€536

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 23/9

08:50-20:12

2 stops17h 22m

Chicago O'Hare Intl

Fri 2/10

10:40-08:15

2 stops15h 35m

€541

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 23/9

08:50-20:12

2 stops17h 22m

Chicago O'Hare Intl

Fri 2/10

08:45-08:15

2 stops17h 30m

€542
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 12/9

09:20-14:05

1 stop10h 45m

Chicago O'Hare Intl

Mon 5/10

20:20-09:45

Nonstop7h 25m

€544

ShannonChicago

SNN - ORD

SNNORD

Shannon

Wed 2/9

09:30-11:50

Nonstop8h 20m

Chicago O'Hare Intl

Wed 23/9

16:00-10:15

2 stops12h 15m

€545

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 18/8

14:15-18:15

1 stop10h 00m

Chicago O'Hare Intl

Mon 21/12

18:30-10:15

1 stop9h 45m

€553

ShannonChicago

SNN - MDW

SNNMDW

Shannon

Tue 7/7

13:05-16:15

2 stops33h 10m

Chicago Midway

Tue 14/7

12:41-11:10

2 stops16h 29m

€940

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 €408, 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 €448.

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 €626. 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 €780.

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 €600. 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 at midday when prices are €758 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 €579 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 DUBLINNovember26% cheaperFlying from Dublin to Chicago costs on average just €408 in November
MOST EXPENSIVE MONTH TO FLY TO CHICAGO FROM DUBLINAugust32% more expensiveIt costs about €732 for flights to Chicago from Dublin in August
MOST POPULAR MONTH TO FLY TO CHICAGO FROM DUBLINOctober300% 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

€317

Best Round-Trip Price

€461

Fastest flight time

31h 40m

Popular in

August
The best one-way flight price to Chicago from Ireland in the last 5 days is €317 (Shannon to Chicago O'Hare Intl).
Search Deals
The best round-trip flight price to Chicago from Ireland in the last 5 days is €461 (Cork to Chicago O'Hare Intl).
Search Deals
The fastest flight to Chicago from Ireland takes 31h 40m (Cork to Chicago Midway).
Search Deals
August has the highest demand for flights to Chicago, with a 13% 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 Magnificent Mile and Grant Park.

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

We recommend purchasing flights from Ireland to Chicago 49 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 €552. However, in the past 72 hours, people saw flights from Ireland for as low as €337.

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 €210 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 McCormick Place?

The closest airport to McCormick Place is 12.7 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 June 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 €471
Shannon to Chicago Flightsfrom €621
Cork to Chicago Flightsfrom €657
Milltown (Kerry) to Chicago Flightsfrom €1,175