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Cheap flights from Ireland to Illinois from €349

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Illinois departing on 15/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ireland to Illinois

Recent return flight deals from Ireland to Illinois

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:20 - 22:42
DUB
-
ORD
32h 22m2 stops
Multiple Airlines Logo
20:43 - 11:20
ORD
-
DUB
32h 37m3 stops
€404Multiple Airlines
Fri, 30 Jan - Fri, 6 Feb
Scandinavian Airlines Logo
11:30 - 16:45
DUB
-
ORD
35h 15m2 stops
Scandinavian Airlines Logo
19:20 - 18:20
ORD
-
DUB
17h 00m1 stop
€406Scandinavian Airlines
Thu, 15 Jan - Wed, 21 Jan
British Airways Logo
20:10 - 15:25
ORK
-
ORD
25h 15m1 stop
British Airways Logo
13:35 - 11:10
ORD
-
ORK
15h 35m2 stops
€497British Airways
Sat, 31 Jan - Sat, 7 Feb
KLM Logo
06:00 - 14:20
ORK
-
ORD
14h 20m1 stop
KLM Logo
16:25 - 23:25
ORD
-
ORK
25h 00m1 stop
€501KLM
Sat, 31 Jan - Sat, 7 Feb
British Airways Logo
20:05 - 15:25
SNN
-
ORD
25h 20m1 stop
British Airways Logo
20:45 - 16:45
ORD
-
SNN
14h 00m1 stop
€513British Airways
Thu, 15 Jan - Mon, 19 Jan
KLM Logo
05:55 - 17:37
DUB
-
MDW
17h 42m2 stops
KLM Logo
09:32 - 08:05
MDW
-
DUB
16h 33m2 stops
€525KLM
Fri, 16 Jan - Mon, 19 Jan
American Airlines Logo
07:40 - 18:45
ORK
-
ORD
17h 05m1 stop
American Airlines Logo
14:38 - 15:25
ORD
-
ORK
18h 47m2 stops
€645American Airlines
Wed, 11 Feb - Sun, 15 Feb
American Airlines Logo
07:40 - 13:50
ORK
-
ORD
12h 10m1 stop
American Airlines Logo
14:41 - 21:00
ORD
-
ORK
24h 19m2 stops
€646American Airlines
Wed, 11 Feb - Sun, 15 Feb
Lufthansa Logo
05:10 - 13:55
DUB
-
STL
14h 45m1 stop
Lufthansa Logo
13:15 - 08:10
STL
-
DUB
12h 55m1 stop
€789Lufthansa
Fri, 30 Jan - Fri, 6 Feb
Lufthansa Logo
05:10 - 23:59
DUB
-
STL
24h 49m2 stops
Lufthansa Logo
18:40 - 17:10
STL
-
DUB
16h 30m2 stops
€815Lufthansa
Fri, 23 Jan - Thu, 5 Feb

Icelandair flights from Ireland to Illinois

Our best Icelandair deals on Ireland to Illinois flight tickets
Icelandair
2 Feb
DUB11:30Dublin
11h 50m
1 stop
ORD17:20Chicago O'Hare Intl
10 Feb
ORD18:30Chicago O'Hare Intl
9h 45m
1 stop
DUB10:15Dublin
€438
Find similar
Icelandair
3 Feb
DUB11:30Dublin
11h 50m
1 stop
ORD17:20Chicago O'Hare Intl
10 Feb
ORD18:30Chicago O'Hare Intl
9h 45m
1 stop
DUB10:15Dublin
€462
Find similar
Icelandair
3 Feb
DUB11:30Dublin
11h 50m
1 stop
ORD17:20Chicago O'Hare Intl
10 Feb
ORD18:30Chicago O'Hare Intl
9h 45m
1 stop
DUB10:15Dublin
€468
Find similar

KLM flights from Ireland to Illinois

Our best KLM deals on Ireland to Illinois flight tickets
KLM
21 Jan
DUB05:55Dublin
14h 25m
1 stop
ORD14:20Chicago O'Hare Intl
25 Jan
ORD13:57Chicago O'Hare Intl
12h 48m
1 stop
DUB08:45Dublin
€487
Find similar
KLM
31 Jan
ORK06:00Cork
14h 20m
1 stop
ORD14:20Chicago O'Hare Intl
7 Feb
ORD16:25Chicago O'Hare Intl
25h 00m
1 stop
ORK23:25Cork
€501
Find similar
KLM
16 Jan
DUB05:55Dublin
17h 42m
2 stops
MDW17:37Chicago Midway
19 Jan
MDW09:32Chicago Midway
16h 33m
2 stops
DUB08:05Dublin
€525
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Ireland to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 18 December 2025.
Use the filters below to find and compare flights from Ireland to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 30/1

20:20-22:42

2 stops32h 22m

Chicago O'Hare Intl

Fri 6/2

20:43-11:20

3 stops32h 37m

€404

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 15/1

11:30-16:45

2 stops35h 15m

Chicago O'Hare Intl

Wed 21/1

19:20-18:20

1 stop17h 00m

€406

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 31/1

20:10-15:25

1 stop25h 15m

Chicago O'Hare Intl

Sat 7/2

13:35-11:10

2 stops15h 35m

€497

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 31/1

06:00-14:20

1 stop14h 20m

Chicago O'Hare Intl

Sat 7/2

16:25-23:25

1 stop25h 00m

€501

ShannonChicago

SNN - ORD

SNNORD

Shannon

Thu 15/1

20:05-15:25

1 stop25h 20m

Chicago O'Hare Intl

Mon 19/1

20:45-16:45

1 stop14h 00m

€513

DublinChicago

DUB - MDW

DUBMDW

Dublin

Fri 16/1

05:55-17:37

2 stops17h 42m

Chicago Midway

Mon 19/1

09:32-08:05

2 stops16h 33m

€525

CorkChicago

ORK - ORD

ORKORD

Cork

Wed 11/2

07:40-18:45

1 stop17h 05m

Chicago O'Hare Intl

Sun 15/2

14:38-15:25

2 stops18h 47m

€645

CorkChicago

ORK - ORD

ORKORD

Cork

Wed 11/2

07:40-13:50

1 stop12h 10m

Chicago O'Hare Intl

Sun 15/2

14:41-21:00

2 stops24h 19m

€646

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 30/1

05:10-13:55

1 stop14h 45m

Lambert-St Louis

Fri 6/2

13:15-08:10

1 stop12h 55m

€789

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 23/1

05:10-23:59

2 stops24h 49m

Lambert-St Louis

Thu 5/2

18:40-17:10

2 stops16h 30m

€815

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 Illinois from

How to get the cheapest flight ticket from Ireland 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 month to fly to Illinois?

The cheapest month to fly to Illinois from Ireland is in September. Flight prices, which tend to average around €401, are often lower during this time because this is during the off-season. If you’re not able to fly to Illinois in September, then November is your next best option. Flight prices from Ireland to Illinois during November average around €402.

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

According to our data, Thursday is the cheapest day to fly to Illinois from Ireland. The lowest ticket price found for a Thursday departure recently was €619. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Tuesday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €724.

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

According to our data, the cheapest time of day to fly to Illinois is in the evening. momondo users have found flights departing from Ireland to Illinois in the evening for as low as €517. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at midday because they tend to be around €666. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ireland to Illinois flight route?

Fly from Dublin to Chicago O'Hare Intl for the best Ireland - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around €516 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Ireland for as low as €462 on momondo.

What cabin class options are available on Ireland to Illinois flights?

There are 3 cabin classes available to choose from on Ireland to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ireland to Illinois flights?

No. A direct flight is the cheapest option for a flight between Ireland to Illinois.

Cheap Ireland to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to Illinois

Best price found

€377

Fastest flight time

8h 05m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Ireland in the past 72 hours is €377. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €530.
The fastest flight from Ireland to Illinois takes 8h 05m
Direct flights go from Ireland to Illinois every day.
There are 98 airports in Illinois. From Ireland there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Ireland to Illinois?

    Prices for flights from Ireland to Illinois are updated daily.

  • How many operators does momondo search for flights from Ireland to Illinois?

  • How old do you have to be to fly from Ireland 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 stopovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to Illinois.

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

    The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Ireland to Illinois?

Best airlines flying from Ireland to Illinois

Compare and see reviews for airlines that fly from Ireland to Illinois with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom €377Free CancellationRating
7.0
591 reviews
Search Icelandair flights
Aer LingusPriceFrom €388Free CancellationRating
7.2
1,399 reviews
Search Aer Lingus flights
United AirlinesPriceFrom €395Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
British AirwaysPriceFrom €397Free CancellationRating
6.7
7,586 reviews
Search British Airways flights
American AirlinesPriceFrom €508Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights

Why use momondo?

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

It is quick and easy to find Ireland to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

Flights from Ireland to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ireland.

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

Of course. momondo tracks the price of Ireland to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Illinois

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