Question 1

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

Accepted Answer

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.

Question 2

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

Accepted Answer

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

Question 3

How can momondo help me find flights to Chicago?

Accepted Answer

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.

Question 4

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

Accepted Answer

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.

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

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.

Question 7

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

Accepted Answer

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.

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

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).

Question 10

Is there a cheaper alternative to flying into Chicago?

Accepted Answer

With an average price of €186 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.

Question 11

Which airlines fly to Chicago O'Hare Intl Airport?

Accepted Answer

Aer Lingus, United Airlines, Finnair and American Airlines are the most popular airlines that fly from Ireland to Chicago O'Hare Intl Airport on a routine basis, according to our data. You should be able to find flights to Chicago O'Hare Intl Airport with these airlines and other airlines flying from Ireland.

Question 12

Finnair Flights to Chicago O'Hare Intl Airport

Accepted Answer

28 Finnair flights head to Chicago O'Hare Intl Airport on average each week. Most will be flying from London Heathrow to Chicago O'Hare Intl Airport, the most popular route that Finnair operates to Chicago O'Hare Intl Airport. Prices vary based on when and where you fly from - the cheapest Finnair flight to Chicago O'Hare Intl Airport found in the past 3 days on momondo was €405, departing from Dublin. Finnair is the most popular choice on momondo for this route and has been scored 7.6/10 by 1,427 of our users.

Question 13

Aer Lingus Flights to Chicago O'Hare Intl Airport

Accepted Answer

Aer Lingus flies to Chicago O'Hare Intl Airport 63 times per week usually, making it a popular airline to fly with, particularly when heading to Chicago O'Hare Intl Airport from Dallas/Fort Worth. Aer Lingus (rating: 7.3, 1,708 reviews) varies in price depending on when and where you want to fly to Chicago O'Hare Intl Airport from. The best Aer Lingus ticket price found on momondo to Chicago O'Hare Intl Airport was from Dublin (€401 return).

Question 14

Which airlines fly to Chicago O'Hare Intl Airport?

Accepted Answer

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 64% of momondo travellers booking flights with this airline.

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

As of August 2026, there are 5 operators available to choose from for flights to Chicago O'Hare Intl Airport.

Question 17

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

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 to Chicago O'Hare Intl Airport.

Question 18

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

Accepted Answer

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.

Question 19

How long does it take to fly to Chicago O'Hare Intl Airport?

Accepted Answer

The flight from Ireland to Chicago O'Hare Intl Airport depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Dublin (a popular airport in Ireland) to Chicago O'Hare Intl (the most popular airport in Chicago O'Hare Intl Airport), then the flight time is 8h on average. If you fly from Cork (another popular airport in Ireland) to Chicago O'Hare Intl, then the average flight time is 13h 50m.

Question 20

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

Accepted Answer

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 €635. 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 €777.

Question 21

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

Accepted Answer

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 €608. Flights to Chicago O'Hare Intl Airport are more costly in the morning, with an average ticket price of €705. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Question 22

What is the cheapest airline that flies from Ireland to Chicago O'Hare Intl?

Accepted Answer

TAP AIR PORTUGAL, British Airways, and Aer Lingus are the most popular carriers operating from Ireland to Chicago O'Hare Intl

Question 23

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

Accepted Answer

In general, November 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 €411. If you are unable to visit Chicago O'Hare Intl Airport during the month of November, then departing from Ireland during the month February is also very affordable. Most momondo users find prices during this month for around €537.

Question 24

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

Accepted Answer

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.

Question 25

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

Accepted Answer

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

Question 26

Which airlines fly to Chicago O'Hare Intl Airport?

Accepted Answer

Aer Lingus, United Airlines and Finnair are the top three most popular airlines that fly to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. Keep in mind that there are 4 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Question 27

How many flights depart from Ireland to Chicago O'Hare Intl Airport on average per week?

Accepted Answer

As of August 2026, 148 flights take off from Ireland and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

Question 28

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

Accepted Answer

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 €589 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 €495 on momondo.

Question 29

How many flights depart from Ireland to Chicago O'Hare Intl Airport on average per day?

Accepted Answer

The number of flights available between Ireland and Chicago O'Hare Intl Airport is 21 per day as of August 2026. The most frequent departure time is 11:00, with 81% of daily flights leaving at midday.

CHEAPEST MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLIN	November	31% cheaper	Flying from Dublin to Chicago O'Hare Intl Airport costs on average just €411 in November
MOST EXPENSIVE MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLIN	July	24% more expensive	It costs about €733 for flights to Chicago O'Hare Intl Airport from Dublin in July
MOST POPULAR MONTH TO FLY TO CHICAGO O'HARE INTL AIRPORT FROM DUBLIN	October	169% more users visited	More momondo users searched in flights to Chicago O'Hare Intl Airport from Dublin in October than any other month

Best One-Way Price	€316
Best Round-Trip Price	€477
Fastest flight time	12h 37m
Popular in	July

€316 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 25/10. 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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What cabin class options are available on Ireland to Chicago O'Hare Intl Airport flights?

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

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

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

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

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

What is the cheapest airline that flies from Ireland to Chicago O'Hare Intl?

Which airlines fly to Chicago O'Hare Intl Airport?

How long does it take to fly to Chicago O'Hare Intl Airport?

How many flights depart from Ireland to Chicago O'Hare Intl Airport on average per day?

How many flights depart from Ireland to Chicago O'Hare Intl Airport on average per week?

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