Question 1

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 62% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 6 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Question 2

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 8h 15m, respectively.

Question 3

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 €522. 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 €660 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 4

What is the cheapest month to fly to Chicago?

Accepted Answer

The cheapest month to fly to Chicago from Ireland is in November. Flight prices, which tend to average around €441, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in November, then you should wait until September to fly from Ireland, when ticket prices are also cheap, with an average price of €448.

Question 5

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 €516 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 €451 on momondo.

Question 6

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 7

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 8

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

Accepted Answer

As of July 2025, there are 129 flights per week flying from Ireland to Chicago. The most common day of the week flights depart is Mon, with 15% 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 18 per day as of July 2025. The most frequent departure time is 11:00, with 51% of daily flights leaving at midday.

Question 10

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 Wednesday. momondo users have found tickets for Wednesday departures for as low as €621. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Sunday is €707.

Question 11

Can stopping save me money on Ireland to Chicago flights?

Accepted Answer

You could potentially save up to 37% on your flight if you consider stops on a Ireland to Chicago flight.

Question 12

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

Accepted Answer

Icelandair, TAP AIR PORTUGAL, and Finnair are the most popular carriers operating from Ireland to Chicago

Question 13

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 14

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

Accepted Answer

There are 6 operators available for flights from Ireland to Chicago as of July 2025.

Question 15

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 16

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	€246
Fastest flight time	8h 00m
Direct flights	Every day
Airports in Chicago	2 airports

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom €335	Free Cancellation	Rating 6.6 7,151 reviews	Search British Airways flights
Icelandair	PriceFrom €339	Free Cancellation	Rating 7.0 518 reviews	Search Icelandair flights
Finnair	PriceFrom €346	Free Cancellation	Rating 7.6 1,316 reviews	Search Finnair flights
Aer Lingus	PriceFrom €355	Free Cancellation	Rating 7.1 1,170 reviews	Search Aer Lingus flights
United Airlines	PriceFrom €378	Free Cancellation	Rating 7.4 8,865 reviews	Search United Airlines flights
American Airlines	PriceFrom €440	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Cheap flights from Ireland to Chicago from €210

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Chicago departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Ireland to Chicago

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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?

You could potentially save up to 37% on your flight if you consider stops on a Ireland to Chicago flight.

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

Icelandair, TAP AIR PORTUGAL, and Finnair are the most popular carriers operating from Ireland to Chicago

Which airlines fly to Chicago?

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

The number of flights available between Ireland and Chicago is 18 per day as of July 2025. The most frequent departure time is 11:00, with 51% of daily flights leaving at midday.

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

As of July 2025, there are 129 flights per week flying from Ireland to Chicago. The most common day of the week flights depart is Mon, with 15% 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 8h 15m, 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

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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?

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