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Flights to Chicago O'Hare Intl

€273 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 7/7. 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.
KLM Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
KLM Logo
06:05 - 11:10
ORD
-
SNN
23h 05m
1 stop
€457KLM
Mon, 1 Jun - Mon, 15 Jun
Multiple Airlines Logo
07:50 - 18:45
SNN
-
ORD
16h 55m
1 stop
Multiple Airlines Logo
17:10 - 11:30
ORD
-
SNN
12h 20m
1 stop
€463Multiple Airlines
Tue, 17 Nov - Mon, 23 Nov
Delta Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
Delta Logo
10:05 - 11:10
ORD
-
SNN
19h 05m
1 stop
€469Delta
Fri, 5 Jun - Tue, 9 Jun
KLM Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
KLM Logo
06:05 - 11:10
ORD
-
SNN
23h 05m
1 stop
€505KLM
Mon, 1 Jun - Sun, 28 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
€513Delta
Tue, 23 Jun - Mon, 29 Jun
Delta Logo
13:05 - 21:36
SNN
-
ORD
14h 31m
1 stop
Delta Logo
18:00 - 11:10
ORD
-
SNN
11h 10m
1 stop
€514Delta
Mon, 1 Jun - Sun, 28 Jun
Iberia Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
Iberia Logo
16:49 - 09:35
ORD
-
DUB
10h 46m
1 stop
€537Iberia
Sun, 14 Jun - Sat, 20 Jun
Iberia Logo
09:30 - 11:29
DUB
-
ORD
7h 59mdirect
Iberia Logo
22:20 - 11:50
ORD
-
DUB
7h 30mdirect
€537Iberia
Fri, 19 Jun - Sun, 21 Jun
Scandinavian Airlines Logo
19:15 - 16:10
DUB
-
ORD
26h 55m
2 stops
Scandinavian Airlines Logo
19:15 - 18:20
ORD
-
DUB
17h 05m
1 stop
€538Scandinavian Airlines
Sun, 20 Sep - Sun, 27 Sep
American Airlines Logo
12:40 - 00:39
DUB
-
ORD
17h 59m
1 stop
American Airlines Logo
13:38 - 06:30
ORD
-
DUB
10h 52m
1 stop
€544American Airlines
Fri, 12 Jun - Fri, 26 Jun

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 21 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

ShannonChicago

SNN - ORD

SNNORD

Shannon

Mon 1/6

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Mon 15/6

06:05-11:10

1 stop23h 05m

€457

ShannonChicago

SNN - ORD

SNNORD

Shannon

Tue 17/11

07:50-18:45

1 stop16h 55m

Chicago O'Hare Intl

Mon 23/11

17:10-11:30

1 stop12h 20m

€463

ShannonChicago

SNN - ORD

SNNORD

Shannon

Fri 5/6

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Tue 9/6

10:05-11:10

1 stop19h 05m

€469

ShannonChicago

SNN - ORD

SNNORD

Shannon

Mon 1/6

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Sun 28/6

06:05-11:10

1 stop23h 05m

€505

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

€513

ShannonChicago

SNN - ORD

SNNORD

Shannon

Mon 1/6

13:05-21:36

1 stop14h 31m

Chicago O'Hare Intl

Sun 28/6

18:00-11:10

1 stop11h 10m

€514

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 14/6

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Sat 20/6

16:49-09:35

1 stop10h 46m

€537
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 19/6

09:30-11:29

Nonstop7h 59m

Chicago O'Hare Intl

Sun 21/6

22:20-11:50

Nonstop7h 30m

€537

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 20/9

19:15-16:10

2 stops26h 55m

Chicago O'Hare Intl

Sun 27/9

19:15-18:20

1 stop17h 05m

€538

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 12/6

12:40-00:39

1 stop17h 59m

Chicago O'Hare Intl

Fri 26/6

13:38-06:30

1 stop10h 52m

€544

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 cabin class options are available on Ireland to Chicago O'Hare Intl Airport flights?

There are 3 cabin classes available to choose from on Ireland to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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 Friday. momondo users have found tickets for Friday departures for as low as €623. 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 €785.

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 €339. 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 €345.

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 €599. Flights to Chicago O'Hare Intl Airport are more costly at midday, with an average ticket price of €743. 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 €572 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 €416 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 DUBLINNovember29% cheaperFlying from Dublin to Chicago O'Hare Intl Airport costs on average just €410 in November
MOST EXPENSIVE MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLINJuly27% more expensiveIt costs about €730 for flights to Chicago O'Hare Intl Airport from Dublin in July
MOST POPULAR MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLINOctober220% 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

€273

Best Round-Trip Price

€457

Fastest flight time

14h 45m

Popular in

July
The best one-way flight price to Chicago from Ireland in the last 5 days is €273 (Dublin to Chicago O'Hare Intl).
Search Deals
The best round-trip flight price to Chicago from Ireland in the last 5 days is €457 (Shannon to Chicago O'Hare Intl).
Search Deals
The fastest flight to Chicago from Ireland takes 14h 45m (Dublin to Chicago O'Hare Intl).
Search Deals
July has the highest demand for flights to Chicago, with a 16% 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 Friday 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 €231 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 4 airlines. If you’re unsure which to fly with, consider booking your flight with Aer Lingus, United Airlines or Finnair as these are the most popular among our users. Aer Lingus is the most favoured with 68% 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 5 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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