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Flights to Chicago O'Hare Intl

€254 Cheap flights to Chicago O'Hare Intl Airport

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Chicago O'Hare Intl Airport departing on 15/7. 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
0 bags

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Find the cheapest flights from Ireland to Chicago O'Hare Intl Airport

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:15 - 14:15
ORK
-
ORD
14h 00m
1 stop
Multiple Airlines Logo
17:10 - 14:40
ORD
-
ORK
15h 30m
1 stop
€494Multiple Airlines
Thu, 18 Jun - Tue, 23 Jun
Multiple Airlines Logo
06:15 - 14:15
ORK
-
ORD
14h 00m
1 stop
Multiple Airlines Logo
20:20 - 14:40
ORD
-
ORK
12h 20m
1 stop
€496Multiple Airlines
Sat, 23 May - Thu, 28 May
KLM Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
KLM Logo
06:05 - 11:10
ORD
-
SNN
23h 05m
1 stop
€509KLM
Mon, 1 Jun - Wed, 10 Jun
Delta Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
Delta Logo
06:07 - 11:10
ORD
-
SNN
23h 03m
1 stop
€510Delta
Tue, 26 May - Tue, 2 Jun
Delta Logo
13:05 - 21:48
SNN
-
ORD
14h 43m
1 stop
Delta Logo
18:00 - 11:10
ORD
-
SNN
11h 10m
1 stop
€511Delta
Tue, 23 Jun - Mon, 29 Jun
British Airways Logo
06:30 - 12:30
DUB
-
ORD
12h 00m
1 stop
British Airways Logo
17:10 - 09:50
ORD
-
DUB
10h 40m
1 stop
€520British Airways
Sat, 24 Oct - Sat, 7 Nov
Finnair Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
Finnair Logo
11:50 - 09:45
ORD
-
DUB
15h 55m
1 stop
€522Finnair
Thu, 21 May - Sat, 30 May
Finnair Logo
09:30 - 11:29
DUB
-
ORD
7h 59mdirect
Finnair Logo
22:20 - 11:50
ORD
-
DUB
7h 30mdirect
€525Finnair
Thu, 18 Jun - Thu, 25 Jun
British Airways Logo
10:30 - 15:55
DUB
-
ORD
11h 25m
1 stop
British Airways Logo
22:20 - 11:50
ORD
-
DUB
7h 30mdirect
€536British Airways
Thu, 4 Jun - Sun, 7 Jun
KLM Logo
17:10 - 14:30
ORK
-
ORD
27h 20m
1 stop
KLM Logo
17:10 - 16:20
ORD
-
ORK
17h 10m
1 stop
€585KLM
Sun, 31 May - Fri, 31 Jul

momondo Fare Finder

 
Locate flights to Chicago O'Hare Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 13,528 searches and data was last updated on 8 May 2026.
Use the filters below to find and compare flights to Chicago O'Hare Intl Airport that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

CorkChicago

ORK - ORD

ORKORD

Cork

Thu 18/6

06:15-14:15

1 stop14h 00m

Chicago O'Hare Intl

Tue 23/6

17:10-14:40

1 stop15h 30m

€494

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 23/5

06:15-14:15

1 stop14h 00m

Chicago O'Hare Intl

Thu 28/5

20:20-14:40

1 stop12h 20m

€496

ShannonChicago

SNN - ORD

SNNORD

Shannon

Mon 1/6

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Wed 10/6

06:05-11:10

1 stop23h 05m

€509

ShannonChicago

SNN - ORD

SNNORD

Shannon

Tue 26/5

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Tue 2/6

06:07-11:10

1 stop23h 03m

€510

ShannonChicago

SNN - ORD

SNNORD

Shannon

Tue 23/6

13:05-21:48

1 stop14h 43m

Chicago O'Hare Intl

Mon 29/6

18:00-11:10

1 stop11h 10m

€511

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 24/10

06:30-12:30

1 stop12h 00m

Chicago O'Hare Intl

Sat 7/11

17:10-09:50

1 stop10h 40m

€520

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 21/5

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Sat 30/5

11:50-09:45

1 stop15h 55m

€522
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 18/6

09:30-11:29

Nonstop7h 59m

Chicago O'Hare Intl

Thu 25/6

22:20-11:50

Nonstop7h 30m

€525

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 4/6

10:30-15:55

1 stop11h 25m

Chicago O'Hare Intl

Sun 7/6

22:20-11:50

Nonstop7h 30m

€536

CorkChicago

ORK - ORD

ORKORD

Cork

Sun 31/5

17:10-14:30

1 stop27h 20m

Chicago O'Hare Intl

Fri 31/7

17:10-16:20

1 stop17h 10m

€585

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 Chicago O'Hare Intl Airport from

Flights to Chicago O'Hare Intl Airport – Travel Insights & Trends

Get data-powered insights and trends for flights to Chicago O'Hare Intl Airport to help you craft the best travel plan.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

On average, the least expensive day to fly to Chicago O'Hare Intl Airport from Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as €606. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Chicago O'Hare Intl Airport is Sunday, with ticket prices averaging around €766.

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

In general, October is the cheapest month to fly from Ireland to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €334. If you are unable to visit Chicago O'Hare Intl Airport during the month of October, then departing from Ireland during the month March is also very affordable. Most momondo users find prices during this month for around €340.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Our data shows that the cheapest Ireland to Chicago O'Hare Intl Airport flights are usually those with departure times in the afternoon. Our users have found flights to Chicago O'Hare Intl Airport in the afternoon for as low as €592. Flights to Chicago O'Hare Intl Airport are more costly at midday, with an average ticket price of €708. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ireland to Chicago O'Hare Intl flight route?

Fly from Dublin to Chicago O'Hare Intl for the best Ireland - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around €558 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Ireland for as low as €411 on momondo.

Cheapest flights to Chicago O'Hare Intl

Find the cheapest flights to Chicago O'Hare Intl from your nearest city or airport
Find flights from Dublin to Chicago O'Hare Intl Airport
CHEAPEST MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLINNovember28% cheaperFlying from Dublin to Chicago O'Hare Intl Airport costs on average just €405 in November
MOST EXPENSIVE MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLINJuly29% more expensiveIt costs about €720 for flights to Chicago O'Hare Intl Airport from Dublin in July
MOST POPULAR MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLINOctober206% more users visitedMore momondo users searched in flights to Chicago O'Hare Intl Airport from Dublin in October than any other month

Cheap Chicago O'Hare Intl Airport flight deals and tips

Summary info about Chicago O'Hare Intl Airport flight prices, duration and airlines

Best One-Way Price

€254

Best Round-Trip Price

€494

Fastest flight time

16h 25m

Popular in

July
The best one-way flight price to Chicago from Ireland in the last 72 hours is €254 (Dublin to Chicago O'Hare Intl).
Search Deals
The best round-trip flight price to Chicago from Ireland in the last 72 hours is €494 (Cork to Chicago O'Hare Intl).
Search Deals
The fastest flight to Chicago from Ireland takes 16h 25m (Dublin to Chicago O'Hare Intl).
Search Deals
July has the highest demand for flights to Chicago, with a 15% price increase on average.
Search Deals

Frequently asked questions about flying to Chicago O'Hare Intl Airport

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

In general, when booking your flight to Chicago O'Hare Intl Airport, November is the cheapest month on average.

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

Most flyers found that booking flight tickets 67 days in advance of their planned departure date is, on average, the best time to get cheap flights to Chicago O'Hare Intl Airport.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

Most of our users find that booking their departure to Chicago O'Hare Intl Airport on a Thursday is the cheapest. Conversely, departing on a Sunday seems to be the most expensive.

What is the cheapest time of day to fly to Chicago O'Hare Intl Airport?

Typically, cheap prices to Chicago O'Hare Intl Airport are most often found for Afternoon flights. Cheap prices are less likely for Midday flights.

Is there an alternative airport near Chicago O'Hare Intl Airport?

Finding an alternative and possibly cheaper destination airport near Chicago O'Hare Intl Airport is possible. If you are planning a flight to Chicago O'Hare Intl Airport, consider booking flights to Chicago Midway Airport (14 km from Chicago city centre) or Chicago Greater Rockford Airport (126 km from Chicago city centre).

Is there a cheaper alternative to flying into Chicago?

With an average price of €228 per person, Chicago Midway Airport is the cheapest airport to fly into when planning your trip to Chicago. This price can fluctuate based on where you are flying from. momondo’s Airport-to-Airport Pricing Tool can help users find the best prices.

Which airlines fly to Chicago O'Hare Intl Airport?

You can find flights to Chicago O'Hare Intl Airport from 5 airlines. If you’re unsure which to fly with, consider booking your flight with Aer Lingus, United Airlines or American Airlines as these are the most popular among our users. Aer Lingus is the most favoured with 69% of momondo travellers booking flights with this airline.

When did momondo last update prices for flights to Chicago O'Hare Intl Airport?

Prices for flights to Chicago O'Hare Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights to Chicago O'Hare Intl Airport?

As of May 2026, there are 6 operators available to choose from for flights to Chicago O'Hare Intl Airport.

How old do you have to be to fly to Chicago O'Hare Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel to Chicago O'Hare Intl Airport.

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

The travel and health documents required for your trip to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Rosemont
Elk Grove Village
Oakbrook Terrace
Crystal Lake

Why use momondo?

Why should I use momondo to find a flight deal to Chicago?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Chicago. Millions of users trust and use momondo every year so you are in good company.

Can I find flights to Chicago with flexible booking policies on momondo?

Yes. All flights to Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Chicago?

Once you have performed a search for flights to Chicago, momondo helps you find the right flight by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight to Chicago right now. Can momondo alert me if prices change?

If you are not ready to book a flight to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to Chicago and let you know when they change.

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Find better results for your trip to Chicago O'Hare Intl Airport ORD

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