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Cheap flights from Ireland to Illinois from €313

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 24/9. 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 Illinois

Recent return flight deals from Ireland to Illinois

Enter your travel dates to find the best prices.
Delta Logo
10:00 - 16:49
DUB
-
ORD
12h 49m
1 stop
Delta Logo
17:45 - 15:25
ORD
-
DUB
15h 40m
2 stops
€534Delta
Fri, 9 Oct - Mon, 12 Oct
Delta Logo
10:00 - 16:49
DUB
-
ORD
12h 49m
1 stop
Delta Logo
17:45 - 15:25
ORD
-
DUB
15h 40m
2 stops
€535Delta
Fri, 9 Oct - Mon, 12 Oct
Aer Lingus Logo
16:45 - 19:15
DUB
-
ORD
8h 30mdirect
Aer Lingus Logo
21:00 - 10:35
ORD
-
DUB
7h 35mdirect
€536Aer Lingus
Tue, 25 Aug - Sat, 29 Aug
KLM Logo
15:00 - 22:04
DUB
-
ORD
13h 04m
1 stop
KLM Logo
12:15 - 07:55
ORD
-
DUB
13h 40m
1 stop
€536KLM
Wed, 7 Oct - Mon, 12 Oct
Delta Logo
11:00 - 22:10
DUB
-
MDW
17h 10m
1 stop
Delta Logo
09:55 - 07:55
MDW
-
DUB
16h 00m
1 stop
€536Delta
Wed, 7 Oct - Mon, 12 Oct
United Airlines Logo
12:30 - 23:40
SNN
-
ORD
17h 10m
2 stops
United Airlines Logo
16:00 - 10:15
ORD
-
SNN
12h 15m
2 stops
€550United Airlines
Sat, 12 Sep - Sun, 20 Sep
United Airlines Logo
09:30 - 11:50
SNN
-
ORD
8h 20mdirect
United Airlines Logo
18:05 - 07:30
ORD
-
SNN
7h 25mdirect
€644United Airlines
Sat, 12 Sep - Sun, 20 Sep
American Airlines Logo
12:40 - 20:26
DUB
-
STL
13h 46m
1 stop
American Airlines Logo
12:41 - 09:35
STL
-
DUB
14h 54m
1 stop
€853American Airlines
Wed, 2 Sep - Sun, 6 Sep
Finnair Logo
09:30 - 00:14
DUB
-
STL
20h 44m
1 stop
Finnair Logo
16:54 - 11:50
STL
-
DUB
12h 56m
1 stop
€916Finnair
Mon, 10 Aug - Tue, 25 Aug
Finnair Logo
09:30 - 00:16
DUB
-
STL
20h 46m
1 stop
Finnair Logo
17:58 - 11:50
STL
-
DUB
11h 52m
1 stop
€920Finnair
Thu, 16 Jul - Wed, 29 Jul

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United Airlines flights from Ireland to Illinois

Our best United Airlines deals on Ireland to Illinois flight tickets
United Airlines
23 Sept
DUB09:20Dublin
16h 28m
1 stop
ORD19:48Chicago O'Hare Intl
2 Oct
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€544
United Airlines
2 Sept
DUB11:35Dublin
8h 05m
ORD13:40Chicago O'Hare Intl
9 Sept
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€546
United Airlines
12 Sept
SNN12:30Shannon
17h 10m
2 stops
ORD23:40Chicago O'Hare Intl
20 Sept
ORD16:00Chicago O'Hare Intl
12h 15m
2 stops
SNN10:15Shannon
€550

JetBlue flights from Ireland to Illinois

Our best JetBlue deals on Ireland to Illinois flight tickets
JetBlue
2 Sept
DUB11:30Dublin
12h 05m
1 stop
ORD17:35Chicago O'Hare Intl
5 Sept
ORD06:00Chicago O'Hare Intl
21h 00m
1 stop
DUB09:00Dublin
€545
JetBlue
18 Aug
DUB11:30Dublin
12h 05m
1 stop
ORD17:35Chicago O'Hare Intl
23 Aug
ORD10:56Chicago O'Hare Intl
15h 24m
1 stop
DUB08:20Dublin
€550
JetBlue
12 Aug
DUB10:40Dublin
14h 47m
1 stop
ORD19:27Chicago O'Hare Intl
19 Aug
ORD20:20Chicago O'Hare Intl
30h 00m
1 stop
DUB08:20Dublin
€562

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 30 June 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 9/10

10:00-16:49

1 stop12h 49m

Chicago O'Hare Intl

Mon 12/10

17:45-15:25

2 stops15h 40m

€534

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 9/10

10:00-16:49

1 stop12h 49m

Chicago O'Hare Intl

Mon 12/10

17:45-15:25

2 stops15h 40m

€535

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 25/8

16:45-19:15

Nonstop8h 30m

Chicago O'Hare Intl

Sat 29/8

21:00-10:35

Nonstop7h 35m

€536

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 7/10

15:00-22:04

1 stop13h 04m

Chicago O'Hare Intl

Mon 12/10

12:15-07:55

1 stop13h 40m

€536

DublinChicago

DUB - MDW

DUBMDW

Dublin

Wed 7/10

11:00-22:10

1 stop17h 10m

Chicago Midway

Mon 12/10

09:55-07:55

1 stop16h 00m

€536

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sat 12/9

12:30-23:40

2 stops17h 10m

Chicago O'Hare Intl

Sun 20/9

16:00-10:15

2 stops12h 15m

€550
Fastest return journey

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sat 12/9

09:30-11:50

Nonstop8h 20m

Chicago O'Hare Intl

Sun 20/9

18:05-07:30

Nonstop7h 25m

€644

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 2/9

12:40-20:26

1 stop13h 46m

Lambert-St Louis

Sun 6/9

12:41-09:35

1 stop14h 54m

€853

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 10/8

09:30-00:14

1 stop20h 44m

Lambert-St Louis

Tue 25/8

16:54-11:50

1 stop12h 56m

€916

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 16/7

09:30-00:16

1 stop20h 46m

Lambert-St Louis

Wed 29/7

17:58-11:50

1 stop11h 52m

€920

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 €238, 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 January is your next best option. Flight prices from Ireland to Illinois during January average around €320.

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 €650. 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 €794.

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 €617. 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 €806. 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 €595 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 €503 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

€770

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 €770. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €678.
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 €408Free CancellationRating
7.3
1,633 reviews
Search Aer Lingus flights
FinnairPriceFrom €412Free CancellationRating
7.6
1,415 reviews
Search Finnair flights
United AirlinesPriceFrom €414Free CancellationRating
7.4
9,897 reviews
Search United Airlines flights
American AirlinesPriceFrom €428Free CancellationRating
7.1
11,766 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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