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Cheap flights from Ireland to Illinois from €320

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 20/8. 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.
Multiple Airlines Logo
07:40 - 13:50
ORK
-
ORD
12h 10m
1 stop
Multiple Airlines Logo
21:50 - 15:25
ORD
-
ORK
11h 35m
1 stop
€465Multiple Airlines
Sun, 1 Nov - Sun, 8 Nov
Multiple Airlines Logo
06:00 - 15:25
ORK
-
ORD
14h 25m
1 stop
Multiple Airlines Logo
17:45 - 14:45
ORD
-
ORK
15h 00m
2 stops
€523Multiple Airlines
Sun, 1 Nov - Sun, 8 Nov
Air Canada Logo
09:50 - 14:36
DUB
-
ORD
34h 46m
1 stop
Air Canada Logo
12:16 - 08:15
ORD
-
DUB
13h 59m
2 stops
€544Air Canada
Sun, 30 Aug - Sat, 19 Sep
Delta Logo
08:55 - 18:01
DUB
-
MDW
15h 06m
2 stops
Delta Logo
18:42 - 10:00
MDW
-
DUB
9h 18m
1 stop
€544Delta
Tue, 25 Aug - Sun, 30 Aug
United Airlines Logo
11:35 - 13:40
DUB
-
ORD
8h 05mdirect
United Airlines Logo
15:00 - 11:10
ORD
-
DUB
14h 10m
1 stop
€547United Airlines
Wed, 23 Sep - Fri, 2 Oct
United Airlines Logo
11:35 - 13:40
DUB
-
ORD
8h 05mdirect
United Airlines Logo
20:20 - 09:45
ORD
-
DUB
7h 25mdirect
€548United Airlines
Wed, 2 Sep - Wed, 9 Sep
Aer Lingus Logo
15:50 - 19:25
DUB
-
ORD
8h 35mdirect
Aer Lingus Logo
17:10 - 09:50
ORD
-
DUB
10h 40m
1 stop
€550Aer Lingus
Sat, 31 Oct - Mon, 2 Nov
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
€614American Airlines
Fri, 4 Dec - Sun, 6 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
€619American Airlines
Fri, 4 Dec - Sun, 6 Dec
Iberia Logo
12:40 - 09:24
DUB
-
STL
26h 44m
1 stop
Iberia Logo
15:33 - 09:45
STL
-
DUB
12h 12m
1 stop
€851Iberia
Tue, 22 Sep - Thu, 8 Oct

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Air Canada flights from Ireland to Illinois

Our best Air Canada deals on Ireland to Illinois flight tickets
Air Canada
30 Aug
DUB09:50Dublin
34h 46m
1 stop
ORD14:36Chicago O'Hare Intl
19 Sept
ORD12:16Chicago O'Hare Intl
13h 59m
2 stops
DUB08:15Dublin
€544
Air Canada
31 Aug
DUB09:50Dublin
16h 39m
2 stops
ORD20:29Chicago O'Hare Intl
17 Sept
ORD15:45Chicago O'Hare Intl
10h 30m
1 stop
DUB08:15Dublin
€546
Air Canada
28 Aug
DUB09:20Dublin
11h 35m
1 stop
ORD14:55Chicago O'Hare Intl
19 Sept
ORD12:16Chicago O'Hare Intl
13h 59m
2 stops
DUB08:15Dublin
€551

American Airlines flights from Ireland to Illinois

Our best American Airlines deals on Ireland to Illinois flight tickets
American Airlines
30 Aug
DUB13:45Dublin
13h 56m
2 stops
ORD21:41Chicago O'Hare Intl
17 Sept
ORD11:40Chicago O'Hare Intl
12h 50m
1 stop
DUB06:30Dublin
€581
American Airlines
4 Dec
SNN14:45Shannon
14h 09m
2 stops
ORD22:54Chicago O'Hare Intl
6 Dec
ORD10:15Chicago O'Hare Intl
14h 05m
2 stops
SNN06:20Shannon
€614
American Airlines
6 Jul
DUB09:30Dublin
8h 00m
ORD11:30Chicago O'Hare Intl
13 Jul
ORD12:00Chicago O'Hare Intl
15h 35m
1 stop
DUB09:35Dublin
€650

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 22 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

Sun 1/11

07:40-13:50

1 stop12h 10m

Chicago O'Hare Intl

Sun 8/11

21:50-15:25

1 stop11h 35m

€465

CorkChicago

ORK - ORD

ORKORD

Cork

Sun 1/11

06:00-15:25

1 stop14h 25m

Chicago O'Hare Intl

Sun 8/11

17:45-14:45

2 stops15h 00m

€523

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 30/8

09:50-14:36

1 stop34h 46m

Chicago O'Hare Intl

Sat 19/9

12:16-08:15

2 stops13h 59m

€544

DublinChicago

DUB - MDW

DUBMDW

Dublin

Tue 25/8

08:55-18:01

2 stops15h 06m

Chicago Midway

Sun 30/8

18:42-10:00

1 stop9h 18m

€544

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 23/9

11:35-13:40

Nonstop8h 05m

Chicago O'Hare Intl

Fri 2/10

15:00-11:10

1 stop14h 10m

€547
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 2/9

11:35-13:40

Nonstop8h 05m

Chicago O'Hare Intl

Wed 9/9

20:20-09:45

Nonstop7h 25m

€548

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 31/10

15:50-19:25

Nonstop8h 35m

Chicago O'Hare Intl

Mon 2/11

17:10-09:50

1 stop10h 40m

€550

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

€614

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

€619

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 22/9

12:40-09:24

1 stop26h 44m

Lambert-St Louis

Thu 8/10

15:33-09:45

1 stop12h 12m

€851

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 €237, 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 €318.

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 €640. 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 €786.

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 €610. 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 €779. 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 €583 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 €500 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

€766

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 €766. The best return flight deal from Ireland to Illinois found on momondo in the last 72 hours is €659.
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 €405Free CancellationRating
7.3
1,617 reviews
Search Aer Lingus flights
FinnairPriceFrom €409Free CancellationRating
7.6
1,415 reviews
Search Finnair flights
United AirlinesPriceFrom €412Free CancellationRating
7.4
9,874 reviews
Search United Airlines flights
American AirlinesPriceFrom €425Free CancellationRating
7.1
11,744 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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