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Cheap flights from Ireland to Illinois from €301

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 22/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ireland to Illinois

Recent return flight deals from Ireland to Illinois

United Airlines Logo
09:20 - 09:51DUB-ORD
30h 31m1 stop
United Airlines Logo
20:20 - 09:45ORD-DUB
7h 25mdirect
€395United Airlines
Find Deal
Sat, 13 Sep - Tue, 30 Sep
United Airlines Logo
09:20 - 20:11DUB-ORD
16h 51m1 stop
United Airlines Logo
20:20 - 09:45ORD-DUB
7h 25mdirect
€396United Airlines
Find Deal
Tue, 16 Sep - Mon, 29 Sep
Aer Lingus Logo
11:35 - 14:00DUB-ORD
8h 25mdirect
Aer Lingus Logo
21:15 - 10:40ORD-DUB
7h 25mdirect
€398Aer Lingus
Find Deal
Sat, 27 Sep - Sat, 4 Oct
Aer Lingus Logo
16:40 - 19:00DUB-ORD
8h 20mdirect
Aer Lingus Logo
21:15 - 10:40ORD-DUB
7h 25mdirect
€413Aer Lingus
Find Deal
Thu, 18 Sep - Wed, 1 Oct
British Airways Logo
10:50 - 23:12DUB-ORD
18h 22m2 stops
British Airways Logo
13:59 - 09:45ORD-DUB
13h 46m2 stops
€414British Airways
Find Deal
Wed, 17 Sep - Wed, 1 Oct
Icelandair Logo
12:15 - 21:15DUB-ORD
15h 00m1 stop
Icelandair Logo
19:25 - 13:15ORD-DUB
11h 50m1 stop
€422Icelandair
Find Deal
Sun, 14 Sep - Wed, 1 Oct
Icelandair Logo
12:15 - 21:15DUB-ORD
15h 00m1 stop
Icelandair Logo
19:25 - 13:15ORD-DUB
11h 50m1 stop
€428Icelandair
Find Deal
Sun, 14 Sep - Sun, 28 Sep
British Airways Logo
11:00 - 23:53DUB-ORD
18h 53m2 stops
British Airways Logo
18:36 - 17:05ORD-DUB
16h 29m2 stops
€435British Airways
Find Deal
Thu, 9 Oct - Tue, 14 Oct
American Airlines Logo
07:50 - 18:45SNN-ORD
16h 55m1 stop
American Airlines Logo
20:45 - 16:45ORD-SNN
14h 00m1 stop
€522American Airlines
Find Deal
Tue, 23 Dec - Tue, 20 Jan
American Airlines Logo
07:50 - 18:45SNN-ORD
16h 55m1 stop
American Airlines Logo
14:52 - 11:30ORD-SNN
14h 38m2 stops
€525American Airlines
Find Deal
Tue, 23 Dec - Tue, 20 Jan

United Airlines flights from Ireland to Illinois

Our best United Airlines deals on Ireland to Illinois flight tickets
United Airlines
13 Sept
DUB09:20Dublin
30h 31m
1 stop
ORD09:51Chicago O'Hare Intl
30 Sept
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€395
Find similar
United Airlines
16 Sept
DUB09:20Dublin
16h 51m
1 stop
ORD20:11Chicago O'Hare Intl
29 Sept
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€396
Find similar
United Airlines
15 Sept
DUB09:20Dublin
16h 51m
1 stop
ORD20:11Chicago O'Hare Intl
27 Sept
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€397
Find similar

Aer Lingus flights from Ireland to Illinois

Our best Aer Lingus deals on Ireland to Illinois flight tickets
Aer Lingus
27 Sept
DUB11:35Dublin
8h 25m
ORD14:00Chicago O'Hare Intl
4 Oct
ORD21:15Chicago O'Hare Intl
7h 25m
DUB10:40Dublin
€398
Find similar
Aer Lingus
7 Sept
DUB11:35Dublin
8h 25m
ORD14:00Chicago O'Hare Intl
14 Sept
ORD15:45Chicago O'Hare Intl
7h 25m
DUB05:10Dublin
€399
Find similar
Aer Lingus
18 Sept
DUB16:40Dublin
8h 20m
ORD19:00Chicago O'Hare Intl
1 Oct
ORD21:15Chicago O'Hare Intl
7h 25m
DUB10:40Dublin
€413
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 31 August 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

Sat 13/9

09:20-09:51

1 stop30h 31m

Chicago O'Hare Intl

Tue 30/9

20:20-09:45

Nonstop7h 25m

€395

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 16/9

09:20-20:11

1 stop16h 51m

Chicago O'Hare Intl

Mon 29/9

20:20-09:45

Nonstop7h 25m

€396

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 27/9

11:35-14:00

Nonstop8h 25m

Chicago O'Hare Intl

Sat 4/10

21:15-10:40

Nonstop7h 25m

€398

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 18/9

16:40-19:00

Nonstop8h 20m

Chicago O'Hare Intl

Wed 1/10

21:15-10:40

Nonstop7h 25m

€413

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/9

10:50-23:12

2 stops18h 22m

Chicago O'Hare Intl

Wed 1/10

13:59-09:45

2 stops13h 46m

€414

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 14/9

12:15-21:15

1 stop15h 00m

Chicago O'Hare Intl

Wed 1/10

19:25-13:15

1 stop11h 50m

€422

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 14/9

12:15-21:15

1 stop15h 00m

Chicago O'Hare Intl

Sun 28/9

19:25-13:15

1 stop11h 50m

€428

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 9/10

11:00-23:53

2 stops18h 53m

Chicago O'Hare Intl

Tue 14/10

18:36-17:05

2 stops16h 29m

€435

ShannonChicago

SNN - ORD

SNNORD

Shannon

Tue 23/12

07:50-18:45

1 stop16h 55m

Chicago O'Hare Intl

Tue 20/1

20:45-16:45

1 stop14h 00m

€522

ShannonChicago

SNN - ORD

SNNORD

Shannon

Tue 23/12

07:50-18:45

1 stop16h 55m

Chicago O'Hare Intl

Tue 20/1

14:52-11:30

2 stops14h 38m

€525

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 January. Flight prices, which tend to average around €425, are often lower during this time because this is during the off-season. If you’re not able to fly to Illinois in January, then September is your next best option. Flight prices from Ireland to Illinois during September average around €436.

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

According to our data, Wednesday is the cheapest day to fly to Illinois from Ireland. The lowest ticket price found for a Wednesday departure recently was €607. 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 €705.

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 €519. 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 €677. 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 €513 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 €440 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.

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

€709

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from Ireland in the past 72 hours is €709. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €467.
The fastest flight from Ireland to Illinois takes 8h 00m
Direct flights go from Ireland to Illinois every day.
There is 1 airport near Illinois: 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 €336Free CancellationRating
7.0
538 reviews
Search Icelandair flights
United AirlinesPriceFrom €355Free CancellationRating
7.4
8,941 reviews
Search United Airlines flights
British AirwaysPriceFrom €375Free CancellationRating
6.7
7,327 reviews
Search British Airways flights
Aer LingusPriceFrom €381Free CancellationRating
7.2
1,247 reviews
Search Aer Lingus flights
American AirlinesPriceFrom €418Free CancellationRating
7.2
10,000 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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