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Cheap flights from Ireland to Illinois from €315

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 9/9. 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
05:45 - 14:25
ORK
-
ORD
14h 40m
1 stop
Delta Logo
17:45 - 15:00
ORD
-
ORK
15h 15m
2 stops
€461Delta
Thu, 5 Nov - Sun, 8 Nov
Delta Logo
05:45 - 18:40
ORK
-
ORD
18h 55m
2 stops
Delta Logo
17:45 - 15:00
ORD
-
ORK
15h 15m
2 stops
€466Delta
Thu, 5 Nov - Sun, 8 Nov
Delta Logo
05:45 - 18:37
ORK
-
MDW
18h 52m
2 stops
Delta Logo
09:55 - 10:40
MDW
-
ORK
18h 45m
2 stops
€470Delta
Thu, 5 Nov - Sun, 8 Nov
United Airlines Logo
09:20 - 14:55
DUB
-
ORD
11h 35m
1 stop
United Airlines Logo
18:00 - 11:10
ORD
-
DUB
11h 10m
1 stop
€544United Airlines
Sat, 12 Sep - Thu, 1 Oct
United Airlines Logo
11:35 - 13:40
DUB
-
ORD
8h 05mdirect
United Airlines Logo
20:20 - 09:45
ORD
-
DUB
7h 25mdirect
€546United Airlines
Wed, 23 Sep - Fri, 2 Oct
Icelandair Logo
12:15 - 21:25
DUB
-
ORD
15h 10m
1 stop
Icelandair Logo
19:25 - 11:05
ORD
-
DUB
9h 40m
1 stop
€547Icelandair
Fri, 10 Jul - Tue, 21 Jul
Finnair Logo
09:30 - 19:26
DUB
-
ORD
15h 56m
1 stop
Finnair Logo
12:04 - 09:45
ORD
-
DUB
15h 41m
1 stop
€550Finnair
Fri, 9 Oct - Mon, 12 Oct
Icelandair Logo
14:15 - 21:25
DUB
-
ORD
13h 10m
1 stop
Icelandair Logo
18:30 - 10:15
ORD
-
DUB
9h 45m
1 stop
€553Icelandair
Tue, 18 Aug - Mon, 21 Dec
American Airlines Logo
14:45 - 22:54
SNN
-
ORD
14h 09m
2 stops
American Airlines Logo
10:15 - 06:20
ORD
-
SNN
14h 05m
2 stops
€612American Airlines
Fri, 4 Dec - Sun, 6 Dec
American Airlines Logo
14:00 - 23:40
SNN
-
ORD
15h 40m
2 stops
American Airlines Logo
10:00 - 05:55
ORD
-
SNN
13h 55m
2 stops
€613American Airlines
Sat, 14 Nov - Wed, 18 Nov

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United Airlines flights from Ireland to Illinois

Our best United Airlines deals on Ireland to Illinois flight tickets
United Airlines
12 Sept
DUB09:20Dublin
10h 45m
1 stop
ORD14:05Chicago O'Hare Intl
4 Oct
ORD18:00Chicago O'Hare Intl
11h 10m
1 stop
DUB11:10Dublin
€544
United Airlines
2 Sept
SNN09:30Shannon
8h 20m
ORD11:50Chicago O'Hare Intl
23 Sept
ORD16:00Chicago O'Hare Intl
12h 15m
2 stops
SNN10:15Shannon
€545
United Airlines
23 Sept
DUB11:35Dublin
8h 05m
ORD13:40Chicago O'Hare Intl
2 Oct
ORD20:20Chicago O'Hare Intl
7h 25m
DUB09:45Dublin
€546

Icelandair flights from Ireland to Illinois

Our best Icelandair deals on Ireland to Illinois flight tickets
Icelandair
9 Jul
DUB14:15Dublin
10h 00m
1 stop
ORD18:15Chicago O'Hare Intl
27 Jul
ORD19:25Chicago O'Hare Intl
11h 50m
1 stop
DUB13:15Dublin
€547
Icelandair
18 Aug
DUB14:15Dublin
13h 10m
1 stop
ORD21:25Chicago O'Hare Intl
21 Dec
ORD18:30Chicago O'Hare Intl
9h 45m
1 stop
DUB10:15Dublin
€553
Icelandair
18 Aug
DUB14:15Dublin
13h 10m
1 stop
ORD21:25Chicago O'Hare Intl
21 Dec
ORD18:30Chicago O'Hare Intl
9h 45m
1 stop
DUB10:15Dublin
€556

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 15 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

CorkChicago

ORK - ORD

ORKORD

Cork

Thu 5/11

05:45-14:25

1 stop14h 40m

Chicago O'Hare Intl

Sun 8/11

17:45-15:00

2 stops15h 15m

€461

CorkChicago

ORK - ORD

ORKORD

Cork

Thu 5/11

05:45-18:40

2 stops18h 55m

Chicago O'Hare Intl

Sun 8/11

17:45-15:00

2 stops15h 15m

€466

CorkChicago

ORK - MDW

ORKMDW

Cork

Thu 5/11

05:45-18:37

2 stops18h 52m

Chicago Midway

Sun 8/11

09:55-10:40

2 stops18h 45m

€470

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 12/9

09:20-14:55

1 stop11h 35m

Chicago O'Hare Intl

Thu 1/10

18:00-11:10

1 stop11h 10m

€544
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 23/9

11:35-13:40

Nonstop8h 05m

Chicago O'Hare Intl

Fri 2/10

20:20-09:45

Nonstop7h 25m

€546

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 10/7

12:15-21:25

1 stop15h 10m

Chicago O'Hare Intl

Tue 21/7

19:25-11:05

1 stop9h 40m

€547

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 9/10

09:30-19:26

1 stop15h 56m

Chicago O'Hare Intl

Mon 12/10

12:04-09:45

1 stop15h 41m

€550

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 18/8

14:15-21:25

1 stop13h 10m

Chicago O'Hare Intl

Mon 21/12

18:30-10:15

1 stop9h 45m

€553

ShannonChicago

SNN - ORD

SNNORD

Shannon

Fri 4/12

14:45-22:54

2 stops14h 09m

Chicago O'Hare Intl

Sun 6/12

10:15-06:20

2 stops14h 05m

€612

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sat 14/11

14:00-23:40

2 stops15h 40m

Chicago O'Hare Intl

Wed 18/11

10:00-05:55

2 stops13h 55m

€613

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 €235, 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 €315.

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 €627. 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 €781.

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 €600. 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 €758. 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 €579 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 €490 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

€763

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 €763. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €668.
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 €402Free CancellationRating
7.3
1,603 reviews
Search Aer Lingus flights
FinnairPriceFrom €406Free CancellationRating
7.7
1,408 reviews
Search Finnair flights
United AirlinesPriceFrom €409Free CancellationRating
7.4
9,831 reviews
Search United Airlines flights
American AirlinesPriceFrom €422Free CancellationRating
7.1
11,660 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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