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Cheap flights from Ireland to Illinois from €273

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 2/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
19:50 - 23:15
DUB
-
ORD
33h 25m
3 stops
Multiple Airlines Logo
19:33 - 10:10
ORD
-
DUB
32h 37m
3 stops
€499Multiple Airlines
Fri, 8 May - Sun, 17 May
Multiple Airlines Logo
19:50 - 23:15
DUB
-
ORD
33h 25m
3 stops
Multiple Airlines Logo
19:33 - 10:10
ORD
-
DUB
32h 37m
3 stops
€499Multiple Airlines
Fri, 8 May - Sun, 17 May
British Airways Logo
10:30 - 18:15
DUB
-
ORD
13h 45m
1 stop
British Airways Logo
17:00 - 12:00
ORD
-
DUB
13h 00m
1 stop
€500British Airways
Tue, 19 May - Mon, 10 Aug
British Airways Logo
10:30 - 18:15
DUB
-
ORD
13h 45m
1 stop
British Airways Logo
21:15 - 16:20
ORD
-
DUB
13h 05m
1 stop
€501British Airways
Tue, 19 May - Sun, 9 Aug
JetBlue Logo
11:30 - 09:54
DUB
-
ORD
28h 24m
1 stop
JetBlue Logo
06:15 - 09:00
ORD
-
DUB
20h 45m
1 stop
€503JetBlue
Fri, 5 Jun - Tue, 9 Jun
Icelandair Logo
12:15 - 21:25
DUB
-
ORD
15h 10m
1 stop
Icelandair Logo
19:25 - 13:15
ORD
-
DUB
11h 50m
1 stop
€505Icelandair
Fri, 4 Sep - Sun, 20 Sep
Icelandair Logo
12:15 - 21:25
DUB
-
ORD
15h 10m
1 stop
Icelandair Logo
19:25 - 13:15
ORD
-
DUB
11h 50m
1 stop
€507Icelandair
Fri, 18 Sep - Mon, 21 Sep
British Airways Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
British Airways Logo
21:15 - 14:35
ORD
-
DUB
11h 20m
1 stop
€509British Airways
Thu, 21 May - Wed, 27 May
Finnair Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
Finnair Logo
22:25 - 11:50
ORD
-
DUB
7h 25mdirect
€512Finnair
Fri, 8 May - Thu, 14 May
Finnair Logo
09:30 - 23:54
DUB
-
STL
20h 24m
1 stop
Finnair Logo
17:14 - 11:50
STL
-
DUB
12h 36m
1 stop
€814Finnair
Thu, 28 May - Sat, 6 Jun

KLM flights from Ireland to Illinois

Our best KLM deals on Ireland to Illinois flight tickets
KLM
25 Apr
ORK06:15Cork
14h 00m
1 stop
ORD14:15Chicago O'Hare Intl
29 Apr
ORD17:10Chicago O'Hare Intl
15h 30m
1 stop
ORK14:40Cork
€564
KLM
7 May
ORK17:10Cork
27h 05m
1 stop
ORD14:15Chicago O'Hare Intl
11 May
ORD14:00Chicago O'Hare Intl
14h 20m
2 stops
ORK10:20Cork
€567
KLM
7 May
ORK17:10Cork
27h 05m
1 stop
ORD14:15Chicago O'Hare Intl
11 May
ORD14:00Chicago O'Hare Intl
14h 20m
2 stops
ORK10:20Cork
€568

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
14 May
ORD22:25Chicago O'Hare Intl
7h 25m
DUB11:50Dublin
€512
Finnair
8 May
DUB09:30Dublin
8h 00m
ORD11:30Chicago O'Hare Intl
14 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
€518

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 23 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

Fri 8/5

19:50-23:15

3 stops33h 25m

Chicago O'Hare Intl

Sun 17/5

19:33-10:10

3 stops32h 37m

€499

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 8/5

19:50-23:15

3 stops33h 25m

Chicago O'Hare Intl

Sun 17/5

19:33-10:10

3 stops32h 37m

€499

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 19/5

10:30-18:15

1 stop13h 45m

Chicago O'Hare Intl

Mon 10/8

17:00-12:00

1 stop13h 00m

€500

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 19/5

10:30-18:15

1 stop13h 45m

Chicago O'Hare Intl

Sun 9/8

21:15-16:20

1 stop13h 05m

€501

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 5/6

11:30-09:54

1 stop28h 24m

Chicago O'Hare Intl

Tue 9/6

06:15-09:00

1 stop20h 45m

€503

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 4/9

12:15-21:25

1 stop15h 10m

Chicago O'Hare Intl

Sun 20/9

19:25-13:15

1 stop11h 50m

€505

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 18/9

12:15-21:25

1 stop15h 10m

Chicago O'Hare Intl

Mon 21/9

19:25-13:15

1 stop11h 50m

€507

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 21/5

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Wed 27/5

21:15-14:35

1 stop11h 20m

€509
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 8/5

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Thu 14/5

22:25-11:50

Nonstop7h 25m

€512

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 28/5

09:30-23:54

1 stop20h 24m

Lambert-St Louis

Sat 6/6

17:14-11:50

1 stop12h 36m

€814

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 €398, 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 €403.

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 €599. 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 €758.

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 €591. 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 €728. 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

€539

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 €539. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €529.
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
FinnairPriceFrom €374Free CancellationRating
7.7
1,390 reviews
Search Finnair flights
IcelandairPriceFrom €377Free CancellationRating
7.0
639 reviews
Search Icelandair flights
Aer LingusPriceFrom €396Free CancellationRating
7.3
1,521 reviews
Search Aer Lingus flights
United AirlinesPriceFrom €405Free CancellationRating
7.4
9,637 reviews
Search United Airlines flights
American AirlinesPriceFrom €416Free CancellationRating
7.1
11,656 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.

An easier way to manage your Illinois trip

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