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Cheap flights from Ireland to Illinois from €269

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 13/5. 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 Illinois

Recent return flight deals from Ireland to Illinois

Enter your travel dates to find the best prices.
JetBlue Logo
10:40 - 20:53
DUB
-
ORD
16h 13m
1 stop
JetBlue Logo
20:30 - 08:20
ORD
-
DUB
29h 50m
1 stop
€492JetBlue
Thu, 7 May - Mon, 1 Jun
JetBlue Logo
11:30 - 07:41
DUB
-
ORD
26h 11m
1 stop
JetBlue Logo
08:31 - 09:00
ORD
-
DUB
18h 29m
1 stop
€493JetBlue
Fri, 1 May - Tue, 5 May
JetBlue Logo
11:30 - 08:47
DUB
-
ORD
27h 17m
1 stop
JetBlue Logo
07:10 - 08:20
ORD
-
DUB
19h 10m
1 stop
€496JetBlue
Tue, 5 May - Fri, 15 May
Icelandair Logo
12:15 - 18:15
DUB
-
ORD
12h 00m
1 stop
Icelandair Logo
19:25 - 13:15
ORD
-
DUB
11h 50m
1 stop
€501Icelandair
Fri, 4 Sep - Sun, 6 Sep
Icelandair Logo
12:15 - 18:15
DUB
-
ORD
12h 00m
1 stop
Icelandair Logo
19:25 - 13:15
ORD
-
DUB
11h 50m
1 stop
€507Icelandair
Wed, 22 Apr - Sun, 26 Apr
KLM Logo
06:15 - 14:15
ORK
-
ORD
14h 00m
1 stop
KLM Logo
17:10 - 14:25
ORD
-
ORK
15h 15m
1 stop
€561KLM
Sat, 25 Apr - Sat, 2 May
KLM Logo
13:05 - 21:56
SNN
-
ORD
14h 51m
1 stop
KLM Logo
06:07 - 11:10
ORD
-
SNN
23h 03m
1 stop
€564KLM
Sat, 23 May - Sat, 30 May
Finnair Logo
09:30 - 22:19
DUB
-
STL
18h 49m
1 stop
Finnair Logo
17:00 - 11:50
STL
-
DUB
12h 50m
1 stop
€813Finnair
Sat, 9 May - Sun, 24 May
Finnair Logo
09:30 - 22:19
DUB
-
STL
18h 49m
1 stop
Finnair Logo
17:00 - 11:50
STL
-
DUB
12h 50m
1 stop
€819Finnair
Sat, 9 May - Sun, 24 May
American Airlines Logo
12:40 - 19:30
DUB
-
STL
12h 50m
1 stop
American Airlines Logo
19:20 - 09:45
STL
-
DUB
32h 25m
1 stop
€874American Airlines
Sat, 9 May - Sun, 24 May

Icelandair flights from Ireland to Illinois

Our best Icelandair deals on Ireland to Illinois flight tickets
Icelandair
4 Sept
DUB12:15Dublin
12h 00m
1 stop
ORD18:15Chicago O'Hare Intl
6 Sept
ORD19:25Chicago O'Hare Intl
11h 50m
1 stop
DUB13:15Dublin
€501
Icelandair
22 Apr
DUB12:15Dublin
12h 00m
1 stop
ORD18:15Chicago O'Hare Intl
26 Apr
ORD19:25Chicago O'Hare Intl
11h 50m
1 stop
DUB13:15Dublin
€507
Icelandair
21 Apr
DUB14:15Dublin
10h 00m
1 stop
ORD18:15Chicago O'Hare Intl
26 Apr
ORD19:25Chicago O'Hare Intl
11h 50m
1 stop
DUB13:15Dublin
€509

Finnair flights from Ireland to Illinois

Our best Finnair deals on Ireland to Illinois flight tickets
Finnair
8 May
DUB09:30Dublin
8h 00m
ORD11:30Chicago O'Hare Intl
17 May
ORD22:25Chicago O'Hare Intl
7h 25m
DUB11:50Dublin
€513
Finnair
8 May
DUB09:40Dublin
14h 10m
1 stop
ORD17:50Chicago O'Hare Intl
17 May
ORD22:25Chicago O'Hare Intl
7h 25m
DUB11:50Dublin
€516
Finnair
8 May
DUB09:30Dublin
8h 00m
ORD11:30Chicago O'Hare Intl
17 May
ORD22:25Chicago O'Hare Intl
7h 25m
DUB11:50Dublin
€517

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 10 April 2026.
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

Cheapest return flight

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 7/5

10:40-20:53

1 stop16h 13m

Chicago O'Hare Intl

Mon 1/6

20:30-08:20

1 stop29h 50m

€492

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 1/5

11:30-07:41

1 stop26h 11m

Chicago O'Hare Intl

Tue 5/5

08:31-09:00

1 stop18h 29m

€493

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 5/5

11:30-08:47

1 stop27h 17m

Chicago O'Hare Intl

Fri 15/5

07:10-08:20

1 stop19h 10m

€496
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 4/9

12:15-18:15

1 stop12h 00m

Chicago O'Hare Intl

Sun 6/9

19:25-13:15

1 stop11h 50m

€501

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 22/4

12:15-18:15

1 stop12h 00m

Chicago O'Hare Intl

Sun 26/4

19:25-13:15

1 stop11h 50m

€507

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 25/4

06:15-14:15

1 stop14h 00m

Chicago O'Hare Intl

Sat 2/5

17:10-14:25

1 stop15h 15m

€561

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sat 23/5

13:05-21:56

1 stop14h 51m

Chicago O'Hare Intl

Sat 30/5

06:07-11:10

1 stop23h 03m

€564

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/5

09:30-22:19

1 stop18h 49m

Lambert-St Louis

Sun 24/5

17:00-11:50

1 stop12h 50m

€813

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/5

09:30-22:19

1 stop18h 49m

Lambert-St Louis

Sun 24/5

17:00-11:50

1 stop12h 50m

€819

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/5

12:40-19:30

1 stop12h 50m

Lambert-St Louis

Sun 24/5

19:20-09:45

1 stop32h 25m

€874

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 €399, 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 €404.

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 €604. 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, Sunday 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 €750.

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 afternoon. momondo users have found flights departing from Ireland to Illinois in the afternoon for as low as €592. 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 €715. 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 €558 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 €412 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?

You could potentially save up to 22% on your flight if you consider stops on a Ireland to Illinois flight.

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

€540

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Ireland in the past 72 hours is €540. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €526.
The fastest flight from Ireland to Illinois takes 8h 00m
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

Frequently asked questions about flying from Ireland to Illinois

  • 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
Aer LingusPriceFrom €397Free CancellationRating
7.2
1,500 reviews
Search Aer Lingus flights
United AirlinesPriceFrom €406Free CancellationRating
7.4
9,562 reviews
Search United Airlines flights
American AirlinesPriceFrom €417Free CancellationRating
7.1
11,564 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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