Cheap flights from Illinois to Belfast from $289
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Belfast departing on 9/11. 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 Illinois to Belfast
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 day to depart on your flight to Belfast?
The cheapest day to depart from Illinois to Belfast is on a Wednesday when prices can be found for as low as $649. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Belfast for around $938.
What is the cheapest time of day to depart on your flight to Belfast?
Our data shows that the cheapest Illinois to Belfast flights are usually those with departure times in the evening. Our users have found flights to Belfast in the evening for as low as $769. Try not to purchase tickets in the afternoon because they tend to be around $804. Of course, these prices can vary depending on the time of year and what airport you fly to.
Cheap Illinois to Belfast flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Belfast
When did momondo last update prices for flights from Illinois to Belfast?
Prices for flights from Illinois to Belfast are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Belfast?
As of July 2025, there are 2 operators available to choose from for flights from Illinois to Belfast.
How old do you have to be to fly from Illinois to Belfast?
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 Illinois to Belfast.
What documentation or ID do you need to fly to Belfast?
The travel and health documents you'll need for your trip to Belfast 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 license and a passport that is valid for six months after your intended arrival at Belfast. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from Illinois to Belfast
Compare and see reviews for airlines that fly from Illinois to Belfast with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $622 | Free Cancellation | Rating 6.6 7,093 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Belfast?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Belfast for you.
Can I find flights from Illinois to Belfast with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Illinois to Belfast flights to just show those with flexible booking policies.
How can momondo help me find flights from Illinois to Belfast?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Illinois.
I’m not ready to book a flight from Illinois to Belfast right now. Can momondo alert me if prices change?
Price alerts on flights to Belfast from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.