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Cheap flights from Dublin to Chicago O'Hare Intl Airport from £340

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
21 Aug — 28 Aug1
1 adult

Cheapflights Tip: The best prices from Dublin to Chicago O'Hare Intl are usually found in February or November, booked 72 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Dublin to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Dublin (DUB) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 August 2025.

Round-trip from

£340

Popular in

July

Cheapest in

February

Average price

£483

Good round-trip deal

£437 or less

Good one-way deal

£405 or less
Icelandair
  • Icelandair
  • 17/12-8/1
  • 2 total stops
  • 21h 35m total
  • Dublin to Chicago
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Highest demand for flights based on searches. 13% potential increase in price (£52 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Dublin to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Dublin to Chicago O'Hare Intl.
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Find flight deals from Dublin to O'Hare Intl

Cheapest flights from Dublin to O'Hare Intl
Explore the most affordable flight options available from Dublin to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2025.

Wed 17/1211:30DUB - ORD
1 stop11h 50mIcelandair
Fri 9/118:30ORD - DUB
1 stop9h 45mIcelandair
Deal found 15/8£340
Wed 29/1005:55DUB - ORD
1 stop14h 25mDelta
Tue 4/1117:20ORD - DUB
1 stop16h 25mDelta
Deal found 15/8£341
Fri 19/1208:50DUB - ORD
1 stop15h 55mBritish Airways
Fri 9/121:45ORD - DUB
1 stop10h 35mBritish Airways
Deal found 15/8£343
Fri 19/1210:45DUB - ORD
1 stop14h 00mBritish Airways
Tue 30/1218:45ORD - DUB
1 stop11h 25mBritish Airways
Deal found 15/8£344
Tue 4/1105:55DUB - ORD
2 stops17h 27mDelta
Tue 11/1117:20ORD - DUB
1 stop16h 25mDelta
Deal found 15/8£345
Mon 15/908:45DUB - ORD
1 stop12h 05mBritish Airways
Sat 27/919:10ORD - DUB
1 stop15h 30mBritish Airways
Deal found 15/8£346
Tue 16/910:30DUB - ORD
1 stop12h 30mBritish Airways
Fri 26/919:15ORD - DUB
1 stop18h 05mBritish Airways
Deal found 14/8£347
Tue 16/908:35DUB - ORD
1 stop12h 15mBritish Airways
Mon 29/919:15ORD - DUB
1 stop10h 35mBritish Airways
Deal found 15/8£348
Wed 8/1009:10DUB - ORD
1 stop11h 50mDelta
Sun 12/1010:25ORD - DUB
2 stops15h 50mDelta
Deal found 15/8£348
Thu 6/1111:15DUB - ORD
2 stops35h 30mScandinavian Airlines
Fri 14/1119:20ORD - DUB
1 stop32h 05mScandinavian Airlines
Deal found 15/8£349

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dublin to O'Hare Intl 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, Cheapflights users made 858,174 searches. Data last updated 16 August 2025.
Use the filters below to find and compare flights from Dublin to Chicago O'Hare Intl Airport that are best for you.

Fly from

Dublin

Fly to

O'Hare Intl

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Tue 6/1

18:30-10:15

1 stop9h 45m

£340

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Sat 10/1

18:30-10:15

1 stop9h 45m

£340

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Fri 9/1

18:30-10:15

1 stop9h 45m

£340

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Wed 7/1

18:30-10:15

1 stop9h 45m

£340

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Thu 8/1

18:30-10:15

1 stop9h 45m

£340

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 8/11

05:55-14:20

1 stop14h 25m

Chicago O'Hare Intl

Thu 13/11

10:40-07:50

2 stops15h 10m

£341

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 30/10

17:15-15:20

1 stop27h 05m

Chicago O'Hare Intl

Tue 4/11

17:20-15:45

1 stop16h 25m

£341

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 29/10

05:55-15:20

1 stop14h 25m

Chicago O'Hare Intl

Tue 4/11

17:20-15:45

1 stop16h 25m

£341

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 31/10

05:55-15:20

1 stop14h 25m

Chicago O'Hare Intl

Tue 4/11

17:20-15:45

1 stop16h 25m

£341

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 28/11

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Mon 1/12

18:30-10:15

1 stop9h 45m

£342

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Showing 1-10 of 21 results
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Best time to book a flight from Dublin to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Dublin with our price prediction graph.
Estimated return 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 Dublin to Chicago O'Hare Intl Airport

How far ahead should I book a flight from Dublin to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a return flight from Dublin to O'Hare Intl. Price data was last updated on 8 August 2025.

The best time to book flights from Dublin to Chicago O'Hare Intl Airport is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Dublin to Chicago O'Hare Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Dublin to Chicago O'Hare Intl Airport (average of £595). Flying from Dublin to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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 DUB to ORD?

Find hourly flight availability from Dublin to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 August 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 7% on flights from Dublin to Chicago O'Hare Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Dublin to Chicago O'Hare Intl Airport

Explore weekly flight availability from Dublin to O'Hare Intl. 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 16 August 2025.

The most flights from DUB to ORD are scheduled on a Monday (20 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).

What’s the top stopover airport for flights from Dublin to Chicago O'Hare Intl Airport?

Share of one-stop return flights from Dublin to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 35% of one-stop itineraries from Dublin to Chicago O'Hare Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Dublin to Chicago O'Hare Intl Airport?

Average return fare for one-stop flights from Dublin to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £283.

What’s the fastest stopover option from Dublin to Chicago O'Hare Intl Airport?

Shortest average travel time for one-stop one-way flights from Dublin to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 25m.

Which airport typically offers the quickest stopover for flights from Dublin to Chicago O'Hare Intl Airport?

Average stopover duration for one-stop one-way flights from Dublin to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average stopover time of 1h 20m.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated 16 August 2025.
See what other customers who have flown with Finnair, United Airlines, andAer Lingus from Dublin to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,321 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
8,916 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Aer Lingus
7.1
Good
1,215 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.0
Good
527 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,267 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.5

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Related info for your journey

Find useful and relevant information for your journey from Dublin to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Dublin to Chicago O'Hare Intl?

    Located just 5.7 mi from the city center, Dublin is the airport most travelers will use when flying to Chicago O'Hare Intl from Dublin. Booking flights from Dublin (DUB) to Chicago O'Hare Intl should be relatively easy as there are 19 daily outbound flights to Chicago O'Hare Intl from 6 different airlines.

  • What are the cheapest airlines flying from Dublin to Chicago O'Hare Intl Airport round-trip?

    Currently priced at £256, Icelandair will fly you from Dublin to Chicago O'Hare Intl Airport and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and United Airlines - these airlines can fly you to your destination from £268 and £289, respectively. Icelandair is 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Dublin to Chicago O'Hare Intl Airport?

    Before booking your flight to Chicago O'Hare Intl Airport from Dublin, check out the most reliable airlines to get you to your destination on time: American Airlines (53%), Aer Lingus (53%), British Airways( 53%).

  • What are the cheapest flights from Dublin to Chicago O'Hare Intl Airport?

    Looking for the cheapest flight from Dublin to Chicago O'Hare Intl Airport? While on average our users pay £1,067, our data indicates the cheapest price to be £344. The most popular route (Dublin - Chicago O'Hare Intl), is priced around £552.

  • Can I find deals for flights from Dublin to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Dublin to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dublin to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dublin to O'Hare Intl.

  • Can I find deals for business class flights from Dublin to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Dublin to O'Hare Intl 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 Dublin to Chicago O'Hare Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Dublin to Chicago O'Hare Intl Airport (average of £595). Flying from Dublin to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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

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
Downers Grove
Elk Grove Village
Rosemont

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Alternative routes for Dublin to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dublin to Midway flights

Top 6 airlines flying from Dublin to O'Hare Intl

Discover the top 6 airlines that operate flights from Dublin to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 August 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£256Average£400FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£268Average£473FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£289Average£564FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£312Average£496FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£324Average£439FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£484Average£584FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Dublin to O'Hare Intl?

Deals for Dublin to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Dublin to O'Hare Intl?

Cheapflights helps you find that perfect flight to O'Hare Intl from Dublin by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Dublin to O'Hare Intl with no change fees?

Need flexible booking options for your flight to O'Hare Intl from Dublin? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dublin to O'Hare Intl become cheaper?

Yes! Start tracking prices for Dublin to O'Hare Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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