What are the cheapest airlines to fly from Illinois to Ireland one-way?

$338 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from $354 and $415, respectively.

How far in advance should I book a flight from Illinois to Ireland?

To save up to 36% on this flight, we recommend booking at least 44 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to Ireland from $571 1-2 weeks out and tickets from $802 for flights departing within the next 72 hours.

What is the cheapest month to fly from Illinois to Ireland?

The best pricing can be found in the month of February. Prices to Ireland from Illinois average $697. You can even find prices in February for less than $697, as users have found deals to Ireland from as low as $382. The month of June appears to be one of the more expensive times to travel to Ireland from Illinois. Flying in the targeted month can save you up to 47%.

Can I find deals for flights from Illinois to Ireland that include hotel bookings?

Yes. In addition to deals on Illinois to Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to Ireland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Ireland.

Can I find deals for business class flights from Illinois to Ireland?

Yes. Cheapflights offers flight deals from Illinois to Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$548+ Flights from Illinois to Ireland

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheap flight deals from Illinois to Ireland

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$522 (Scandinavian Airlines)
One-way from	$237 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$654
Good round-trip deal	$706 or less
Good one-way deal	$513 or less

Provider with most accurate pricing for Chicago (CHI)-Dublin flight deals.

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Provider most trusted by Cheapflights users for Chicago (CHI)-Dublin flights.

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From Illinois to Ireland

Search Deals

One-way flight from Illinois to Ireland

Search Deals

Highest demand for flights based on searches. 22% potential increase in price ($197 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Illinois to Ireland.

Search Deals

Price to beat on a one-way flight from Illinois to Ireland.

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Find flight deals from Illinois to Ireland

Cheapest flights from Illinois to Ireland
Explore the most affordable flight options available from Illinois to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

Fri 8/156:00 pmORD - DUB

1 stop24h 05mTAP AIR PORTUGAL

Fri 8/225:30 amDUB - ORD

1 stop16h 40mTAP AIR PORTUGAL

Deal found 4/1

$564

Wed 10/151:00 pmMDW - DUB

2 stops14h 15mDelta

Wed 10/2210:00 amDUB - MDW

1 stop14h 07mDelta

Deal found 4/1

$565

Tue 5/139:15 pmORD - DUB

Nonstop7h 25mAer Lingus

Tue 5/204:40 pmDUB - ORD

Nonstop8h 20mAer Lingus

Deal found 4/1

$565

Tue 5/2710:25 pmORD - DUB

1 stop12h 40mMultiple Airlines

Thu 6/59:45 amDUB - ORD

1 stop14h 05mMultiple Airlines

Deal found 4/1

$566

Thu 8/217:15 pmORD - DUB

1 stop17h 00mScandinavian Airlines

Thu 8/2812:20 pmDUB - ORD

2 stops33h 50mScandinavian Airlines

Deal found 4/1

$567

Sun 9/78:20 pmORD - DUB

Nonstop7h 25mUnited Airlines

Tue 9/239:20 amDUB - ORD

1 stop16h 51mUnited Airlines

Deal found 4/1

$570

Wed 4/3012:09 pmORD - DUB

1 stop15h 36mFinnair

Thu 5/159:45 amDUB - ORD

1 stop14h 05mFinnair

Deal found 4/1

$572

Thu 10/910:40 amORD - DUB

2 stops15h 35mAir Canada

Thu 10/169:50 amDUB - ORD

1 stop15h 39mAir Canada

Deal found 4/1

$573

Tue 8/56:05 pmORD - SNN

Nonstop7h 25mUnited Airlines

Wed 8/209:30 amSNN - ORD

Nonstop8h 15mUnited Airlines

Deal found 4/1

$580

Fri 10/175:45 pmORD - ORK

1 stop11h 00mAmerican Airlines

Wed 10/227:20 amORK - ORD

1 stop13h 30mAmerican Airlines

Deal found 4/1

$582

Tue 5/131:55 pmMDW - DUB

1 stop11h 50mKLM

Tue 5/2012:00 pmDUB - MDW

1 stop11h 45mKLM

Deal found 4/1

$586

Sun 4/133:00 pmORD - DUB

1 stop13h 45mKLM

Tue 4/2212:00 pmDUB - ORD

1 stop16h 56mKLM

Deal found 4/1

$586

Best flights from Illinois to Ireland
Discover carefully curated flight deals from Illinois to Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2025.

Sat 9/277:15 pmORD - DUB

2 stops17h 10mScandinavian Airlines

Sat 10/118:05 pmDUB - ORD

2 stops50h 05mScandinavian Airlines

Deal found 3/31

$522

Tue 5/2710:25 pmORD - DUB

1 stop12h 40mMultiple Airlines

Thu 6/59:45 amDUB - ORD

1 stop14h 05mMultiple Airlines

Deal found 4/1

$566

Sun 9/78:20 pmORD - DUB

Nonstop7h 25mUnited Airlines

Tue 9/239:20 amDUB - ORD

1 stop16h 51mUnited Airlines

Deal found 4/1

$570

Tue 5/273:45 pmORD - DUB

Nonstop7h 25mAer Lingus

Thu 6/54:40 pmDUB - ORD

Nonstop8h 20mAer Lingus

Deal found 4/1

$571

Wed 8/279:15 pmORD - DUB

1 stop11h 20mBritish Airways

Wed 9/312:45 pmDUB - ORD

1 stop11h 30mBritish Airways

Deal found 3/31

$572

Tue 5/139:30 pmORD - DUB

1 stop13h 45mFinnair

Tue 5/209:45 amDUB - ORD

1 stop14h 05mFinnair

Deal found 4/1

$574

Thu 5/18:50 amORD - DUB

1 stop17h 30mJetBlue

Tue 5/611:30 amDUB - ORD

1 stop16h 24mJetBlue

Deal found 4/1

$575

Sun 4/134:00 pmORD - DUB

1 stop10h 15mAir Canada

Thu 5/89:50 amDUB - ORD

2 stops14h 32mAir Canada

Deal found 4/1

$583

Sun 4/133:00 pmORD - DUB

1 stop13h 45mKLM

Tue 4/2212:00 pmDUB - ORD

1 stop16h 56mKLM

Deal found 4/1

$586

Wed 9/2411:25 amORD - DUB

1 stop22h 30mTurkish Airlines

Wed 10/11:35 pmDUB - ORD

1 stop26h 05mTurkish Airlines

Deal found 4/1

$592

Mon 4/285:45 pmORD - ORK

1 stop11h 00mAmerican Airlines

Tue 5/137:20 amORK - ORD

1 stop13h 20mAmerican Airlines

Deal found 4/1

$592

Mon 5/126:30 pmORD - DUB

1 stop10h 15mDelta

Fri 5/3010:00 amDUB - ORD

1 stop12h 45mDelta

Deal found 4/1

$595

Last-minute flights from Illinois to Ireland
Discover last-minute flight deals from Illinois to Ireland. Data last updated April 2, 2025 and is based on user searches.

Wed 4/26:00 pmORD - DUB

1 stop18h 05mTAP AIR PORTUGAL

Tue 4/86:50 pmDUB - ORD

1 stop27h 20mTAP AIR PORTUGAL

Deal found 4/1

$589

Mon 4/74:00 pmORD - DUB

1 stop10h 15mAir Canada

Wed 4/169:50 amDUB - ORD

1 stop11h 05mAir Canada

Deal found 3/31

$584

Mon 4/77:05 amORD - DUB

1 stop19h 40mDelta

Wed 4/1612:00 pmDUB - ORD

1 stop16h 06mDelta

Deal found 4/1

$595

Mon 4/76:35 pmORD - DUB

1 stop17h 15mSWISS

Wed 4/1611:35 amDUB - ORD

Nonstop8h 00mSWISS

Deal found 4/1

$658

Tue 4/89:15 pmORD - DUB

Nonstop7h 25mAer Lingus

Tue 4/2211:35 amDUB - ORD

Nonstop8h 25mAer Lingus

Deal found 3/31

$571

Tue 4/812:09 pmORD - DUB

1 stop15h 36mFinnair

Tue 4/229:45 amDUB - ORD

1 stop14h 05mFinnair

Deal found 3/31

$572

Tue 4/88:15 pmORD - DUB

Nonstop7h 30mUnited Airlines

Tue 4/1511:35 amDUB - ORD

Nonstop8h 00mUnited Airlines

Deal found 4/1

$581

Tue 4/87:10 pmORD - DUB

1 stop10h 45mAmerican Airlines

Tue 4/159:30 amDUB - ORD

1 stop14h 06mAmerican Airlines

Deal found 4/1

$588

Tue 4/812:48 pmMDW - DUB

1 stop13h 57mKLM

Tue 4/2210:00 amDUB - MDW

1 stop13h 19mKLM

Deal found 4/1

$595

Tue 4/82:53 pmORD - DUB

2 stops20h 07mMultiple Airlines

Tue 4/226:40 pmDUB - ORD

3 stops43h 55mMultiple Airlines

Deal found 3/31

$596

Tue 4/89:23 amMDW - DUB

2 stops17h 22mDelta

Tue 4/2211:00 amDUB - MDW

1 stop17h 22mDelta

Deal found 4/1

$600

Tue 4/811:36 amORD - DUB

2 stops14h 54mIberia

Tue 4/159:30 amDUB - ORD

1 stop16h 31mIberia

Deal found 4/1

$608

One-way flights from Illinois to Ireland
Search for one-way flight options from Illinois to Ireland. Find affordable one-way fares based on user searches. Data last updated April 2, 2025.

Mon 4/712:14 pmORD - DUB

2 stops27h 06mMultiple Airlines

Deal found 4/1

$237

Wed 4/912:46 pmMDW - DUB

2 stops29h 29mMultiple Airlines

Deal found 4/1

$280

Sun 4/66:00 pmORD - DUB

1 stop18h 05mTAP AIR PORTUGAL

Deal found 4/1

$338

Mon 4/287:25 pmORD - DUB

1 stop9h 40mIcelandair

Deal found 4/1

$354

Sun 6/19:40 amMDW - ORK

2 stops41h 20mMultiple Airlines

Deal found 4/1

$366

Sun 6/16:00 amORD - ORK

3 stops45h 00mMultiple Airlines

Deal found 4/1

$409

Sun 6/15:30 pmORD - DUB

3 stops34h 30mWestJet

Deal found 3/31

$415

Sun 6/159:40 amMDW - DUB

1 stop19h 50mAir Transat

Deal found 4/1

$417

Mon 4/287:15 pmORD - DUB

1 stop34h 35mScandinavian Airlines

Deal found 3/31

$438

Wed 4/93:45 pmORD - DUB

Nonstop7h 25mAer Lingus

Deal found 4/1

$440

Thu 6/56:17 pmORD - SNN

3 stops40h 03mMultiple Airlines

Deal found 4/1

$454

Mon 8/117:32 pmSTL - ORK

3 stops42h 53mMultiple Airlines

Deal found 4/1

$454

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Fri 8/15

6:00 pm-12:05 am

1 stop24h 05m

Dublin

Fri 8/22

5:30 am-4:10 pm

1 stop16h 40m

$564

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Tue 5/13

9:15 pm-10:40 am

Nonstop7h 25m

Dublin

Tue 5/20

4:40 pm-7:00 pm

Nonstop8h 20m

$565

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Tue 5/27

10:25 pm-5:05 pm

1 stop12h 40m

Dublin

Thu 6/5

9:45 am-5:50 pm

1 stop14h 05m

$566

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Thu 8/21

7:15 pm-6:15 pm

1 stop17h 00m

Dublin

Thu 8/28

12:20 pm-4:10 pm

2 stops33h 50m

$567

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Sun 9/7

8:20 pm-9:45 am

Nonstop7h 25m

Dublin

Tue 9/23

9:20 am-8:11 pm

1 stop16h 51m

$570

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 4/30

12:09 pm-9:45 am

1 stop15h 36m

Dublin

Thu 5/15

9:45 am-5:50 pm

1 stop14h 05m

$572

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Tue 5/13

4:03 pm-8:20 am

1 stop10h 17m

Dublin

Sat 5/24

11:30 am-9:54 pm

1 stop16h 24m

$575

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

Tue 8/5

6:05 pm-7:30 am

Nonstop7h 25m

Shannon

Wed 8/20

9:30 am-11:45 am

Nonstop8h 15m

$580

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Sun 4/13

7:20 am-8:15 am

2 stops18h 55m

Dublin

Thu 4/24

9:50 am-8:02 am

2 stops28h 12m

$583

ChicagoDublin

MDW - DUB

MDWDUB

Chicago Midway

Tue 5/13

1:55 pm-7:45 am

1 stop11h 50m

Dublin

Tue 5/20

12:00 pm-5:45 pm

1 stop11h 45m

$586

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 60 results

...

Best time to book a flight from Illinois to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from Illinois with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Ireland

What is the cheapest month to book a flight from Illinois to Ireland?

Currently, November is the cheapest month in which you can book a flight from Illinois to Ireland (average of $509). Flying from Illinois to Ireland in June is currently the most expensive (average of $1,010). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to IE?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Ireland as you normally would.

Weekly flight availability from Illinois to Ireland

The most flights from USIL to IE0 are scheduled on a Monday (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Ireland by month

In terms of precipitation, rainfall in Ireland ranges from 1.9 - 3.1 inches per month. October is typically the wettest month, when rainfall can reach 3.1 in. February is typically the driest time to visit Ireland when rainfall is around 1.9 in.

Temperature in Ireland by month

If weather is an important factor for your trip to Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Ireland

Read through reviews of airlines operating flights from Illinois to Ireland, such as Delta, KLM and Air Transat. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,898 reviews

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

771 reviews

Delta

8.0

Very good

7,898 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Illinois to Ireland one-way?
$338 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from $354 and $415, respectively.
Can I find deals for flights from Illinois to Ireland that include hotel bookings?
Yes. In addition to deals on Illinois to Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Ireland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Ireland.
Can I find deals for business class flights from Illinois to Ireland?
Yes. Cheapflights offers flight deals from Illinois to Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Illinois to Ireland?
Currently, November is the cheapest month in which you can book a flight from Illinois to Ireland (average of $509). Flying from Illinois to Ireland in June is currently the most expensive (average of $1,010). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Illinois to Ireland

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Champaign to Dublin flights

Top 10 airlines flying from Illinois to Ireland

Airline	Cheapest	Average	Flexibility	On-time
Air France	Cheapest$196	Average$200	FlexibilityNo cancel fee	On-time77%
Scandinavian Airlines	Cheapest$341	Average$489	FlexibilityNo cancel fee	On-time77%
Icelandair	Cheapest$355	Average$559	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$394	Average$474	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$445	Average$704	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$482	Average$769	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$509	Average$942	FlexibilityNo cancel fee	On-time71%
Iberia	Cheapest$509	Average$733	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$513	Average$898	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$519	Average$670	FlexibilityNo cancel fee	On-time70%

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$237+ Cheap flights from Illinois to Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Ireland with Cheapflights

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Cheap flight deals from Illinois to Ireland

Keep the following information in mind while searching for Illinois to Ireland flight deals. Data was last updated April 2, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to Ireland

Cheapest flights from Illinois to IrelandExplore the most affordable flight options available from Illinois to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

Explore the most affordable flight options available from Illinois to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Ireland that are best for you.

Best time to book a flight from Illinois to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Ireland

What is the cheapest month to book a flight from Illinois to Ireland?

What is the cheapest time of day to fly from IL to IE?

Find hourly flight availability from Illinois to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 2, 2025.

Weekly flight availability from Illinois to Ireland

Explore weekly flight availability from Illinois to Ireland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 2, 2025.

Rainfall in Ireland by month

Plan your trip to Ireland by taking into account the average rainfall totals by month.

Temperature in Ireland by month

Plan your trip to Ireland by taking into account the average temperature totals by month.

Reviews of airlines servicing Ireland

Read through reviews of airlines operating flights from Illinois to Ireland, such as Delta, KLM and Air Transat. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Illinois to Ireland one-way?

Can I find deals for flights from Illinois to Ireland that include hotel bookings?

How can I find direct flights from Illinois to Ireland?

Can I find deals for business class flights from Illinois to Ireland?

What is the cheapest month to book a flight from Illinois to Ireland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Ireland

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Illinois to Ireland

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Cheapest flights from Illinois to Ireland
Explore the most affordable flight options available from Illinois to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.