Question 1

How often are flights from Ireland to Chicago delayed?

Accepted Answer

Historically, on average around 12% of flights between Ireland and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

Question 2

What is the cheapest time of day to depart on your flight to Chicago?

Accepted Answer

In the evening is the cheapest time of day to fly from Ireland to Chicago when you can find flight prices for as low as €514. Flying to Chicago in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at midday when prices are €663 on average. Flights to Chicago from Ireland at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

Question 3

Which airlines fly to Chicago?

Accepted Answer

Aer Lingus, United Airlines and British Airways are the top three most popular airlines that fly to Chicago from Ireland according to our data. Aer Lingus is the first choice among our users, with 64% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 5 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Question 4

How long does it take to fly to Chicago?

Accepted Answer

If you’re flying from a popular airport in Ireland, such as Dublin or Shannon, and flying into Chicago, then you can expect flight times to average 8h and 12h 10m, respectively.

Question 5

What is the cheapest day to depart on your flight to Chicago?

Accepted Answer

On average, the least expensive day to fly to Chicago from Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as €622. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Tuesday is €721.

Question 6

What is the most punctual flight time for Ireland to Chicago flights?

Accepted Answer

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning have, in the past, seen delays more frequently in comparison.

Question 7

Which airline has the best punctuality record on Ireland to Chicago flights?

Accepted Answer

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 7% of their flights experiencing any sort of delay.

Question 8

How many flights depart from Ireland to Chicago on average per week?

Accepted Answer

As of December 2025, there are 60 flights per week flying from Ireland to Chicago. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.

Question 9

How many flights depart from Ireland to Chicago on average per day?

Accepted Answer

The number of flights available between Ireland and Chicago is 8 per day as of December 2025. The most frequent departure time is 10:00, with 81% of daily flights leaving at midday.

Question 10

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Question 11

What is the cheapest month to fly to Chicago?

Accepted Answer

The cheapest month to fly to Chicago from Ireland is in September. Flight prices, which tend to average around €399, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in September, then you should wait until November to fly from Ireland, when ticket prices are also cheap, with an average price of €401.

Question 12

What is the cheapest Ireland to Chicago flight route?

Accepted Answer

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

Question 13

How far in advance should I book a flight to Chicago?

Accepted Answer

You are more likely to see cheaper flights to Chicago from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €514 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Ireland for as low as €460 on momondo.

Question 14

What is the cheapest airline that flies from Ireland to Chicago?

Accepted Answer

Aer Lingus, Delta, and British Airways are the most popular carriers operating from Ireland to Chicago

Question 15

What cabin class options are available on Ireland to Chicago flights?

Accepted Answer

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

Question 16

Can stopping save me money on Ireland to Chicago flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between Ireland to Chicago.

Question 17

When did momondo last update prices for flights from Ireland to Chicago?

Accepted Answer

Prices for flights from Ireland to Chicago were last updated today.

Question 18

How many operators does momondo search for flights from Ireland to Chicago?

Accepted Answer

There are 5 operators available for flights from Ireland to Chicago as of December 2025.

Question 19

How old do you have to be to fly from Ireland to Chicago?

Accepted Answer

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 from Ireland to Chicago.

Question 20

What documentation or ID do you need to fly to Chicago?

Accepted Answer

The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best price found	€375
Fastest flight time	8h 05m
Direct flights	Every day
Airports in Chicago	3 airports

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom €375	Free Cancellation	Rating 7.0 592 reviews	Search Icelandair flights
Aer Lingus	PriceFrom €387	Free Cancellation	Rating 7.2 1,412 reviews	Search Aer Lingus flights
United Airlines	PriceFrom €393	Free Cancellation	Rating 7.4 9,112 reviews	Search United Airlines flights
British Airways	PriceFrom €396	Free Cancellation	Rating 6.7 7,609 reviews	Search British Airways flights
American Airlines	PriceFrom €506	Free Cancellation	Rating 7.2 11,052 reviews	Search American Airlines flights

Cheap flights from Ireland to Chicago from €371

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 Chicago departing on 15/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Ireland to Chicago

Recent return flight deals from Ireland to Chicago

Recent one-way flight deals from Ireland to Chicago

Recent last minute flight deals from Ireland to Chicago

Recent direct flight deals from Ireland to Chicago

Aer Lingus flights from Ireland to Chicago

Our best Aer Lingus deals on Ireland to Chicago flight tickets

Icelandair flights from Ireland to Chicago

Our best Icelandair deals on Ireland to Chicago flight tickets

momondo Fare Finder

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

See travel insights to Chicago from

How to get the cheapest flight ticket from Ireland to Chicago

What is the cheapest month to fly to Chicago?

What is the cheapest day to depart on your flight to Chicago?

What is the cheapest time of day to depart on your flight to Chicago?

What is the cheapest Ireland to Chicago flight route?

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

How far in advance should I book a flight to Chicago?

What cabin class options are available on Ireland to Chicago flights?

There are 3 cabin classes available to choose from on Ireland to Chicago 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 Chicago flights?

No. A direct flight is the cheapest option for a flight between Ireland to Chicago.

What is the cheapest airline that flies from Ireland to Chicago?

Aer Lingus, Delta, and British Airways are the most popular carriers operating from Ireland to Chicago

Which airlines fly to Chicago?

How often are flights from Ireland to Chicago delayed?

Historically, on average around 12% of flights between Ireland and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

What is the most punctual flight time for Ireland to Chicago flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Ireland to Chicago flights?

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 7% of their flights experiencing any sort of delay.

How many flights depart from Ireland to Chicago on average per day?

The number of flights available between Ireland and Chicago is 8 per day as of December 2025. The most frequent departure time is 10:00, with 81% of daily flights leaving at midday.

How many flights depart from Ireland to Chicago on average per week?

As of December 2025, there are 60 flights per week flying from Ireland to Chicago. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.

How long does it take to fly to Chicago?

If you’re flying from a popular airport in Ireland, such as Dublin or Shannon, and flying into Chicago, then you can expect flight times to average 8h and 12h 10m, respectively.

Cheap Ireland to Chicago flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to Chicago

Best price found

Fastest flight time

Direct flights

Airports in Chicago

When did momondo last update prices for flights from Ireland to Chicago?

How many operators does momondo search for flights from Ireland to Chicago?

How old do you have to be to fly from Ireland to Chicago?

What documentation or ID do you need to fly to Chicago?

What is the most popular plane model from Ireland to Chicago?

Best airlines flying from Ireland to Chicago

Compare and see reviews for airlines that fly from Ireland to Chicago with momondo

Why use momondo?

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

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

How can momondo help me find flights from Ireland to Chicago?

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

An easier way to manage your Chicago trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 25.6 km from Chicago