$350 Find Cheap Flights from Frankfurt am Main to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Frankfurt am Main to Illinois departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Frankfurt am Main to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Frankfurt am Main to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Frankfurt am Main to Illinois

Wed, Sep 2 - Thu, Sep 10
Multiple Airlines Logo
12:30 pm - 7:26 pm-
13h 56m
Multiple Airlines Logo
9:38 am - 5:45 am-
13h 07m
$612Multiple Airlines
Sun, Aug 30 - Tue, Jan 12
Icelandair Logo
2:00 pm - 9:25 pm-
14h 25m
Icelandair Logo
6:30 pm - 12:10 pm-
10h 40m
$615Icelandair
Tue, Sep 1 - Fri, Sep 11
Multiple Airlines Logo
12:30 pm - 7:26 pm-
13h 56m
Multiple Airlines Logo
9:38 am - 5:45 am-
13h 07m
$620Multiple Airlines
Sun, Jan 24 - Sat, Jan 30
Scandinavian Airlines Logo
3:15 pm - 4:45 pm-
32h 30m
Scandinavian Airlines Logo
7:15 pm - 2:30 pm-
12h 15m
$625Scandinavian Airlines
Tue, Oct 6 - Thu, Oct 22
United Airlines Logo
12:40 pm - 2:55 pm-
9h 15mnonstop
United Airlines Logo
6:06 pm - 12:10 pm-
11h 04m
$694United Airlines
Tue, Oct 6 - Thu, Oct 22
United Airlines Logo
12:40 pm - 2:55 pm-
9h 15mnonstop
United Airlines Logo
12:55 pm - 7:20 am-
11h 25m
$694United Airlines
Wed, Aug 26 - Sat, Sep 5
United Airlines Logo
12:40 pm - 2:55 pm-
9h 15mnonstop
United Airlines Logo
10:25 am - 9:10 am-
15h 45m
$694United Airlines
Fri, Oct 16 - Fri, Oct 23
Lufthansa Logo
10:40 am - 1:25 pm-
9h 45mnonstop
Lufthansa Logo
7:01 pm - 2:05 pm-
12h 04m
$758Lufthansa
Fri, Oct 16 - Sat, Oct 24
Lufthansa Logo
10:40 am - 1:25 pm-
9h 45mnonstop
Lufthansa Logo
7:01 pm - 2:45 pm-
12h 44m
$758Lufthansa
Tue, Oct 20 - Wed, Oct 28
Lufthansa Logo
8:50 am - 11:00 am-
9h 10mnonstop
Lufthansa Logo
3:56 pm - 10:55 am-
12h 59m
$759Lufthansa
Booking Insights

KAYAK's insights & trends for Frankfurt am Main to Illinois flights

Get data-powered insights and trends into flights from Frankfurt am Main to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Frankfurt am Main to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Frankfurt am Main to Illinois departing in September.

Flight prices are below average for this route right now.

Flights to Illinois from Frankfurt am Main usually cost between $799 and $1,054 in September.
The lowest price found in the past 5 days was $612 on Multiple Airlines (Sep 2-Sep 10).

What is the cheapest Frankfurt am Main to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Frankfurt am Main found in the last 5 days was to Chicago, at $677 round-trip. The most popular route is from Frankfurt am Main Airport (FRA) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $677.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Frankfurt am Main to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $860 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $872.

What is the cheapest month to fly from Frankfurt am Main to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Frankfurt am Main to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Frankfurt am Main to Illinois is November, when tickets cost $691 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $997 and $915 respectively.

What’s the cheapest day of the week to fly from Frankfurt am Main to Illinois?

The average price of all round-trip flights from Frankfurt am Main to Illinois clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Illinois on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Frankfurt am Main to Illinois. For your return ticket, we recommend flying on a Tuesday and avoiding Saturdays for the best deals.

How far in advance should I book a flight from Frankfurt am Main to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Frankfurt am Main to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Frankfurt am Main to Illinois, you should book around 2 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

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Good to know

Cheapest flight

$350
Flight from Frankfurt-Hahn to Chicago

Flights from Frankfurt am Main to Illinois: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Frankfurt am Main to Illinois 
Learn how KAYAK collects reviews and tips from users.
KEVINFlew with Lufthansa-Dec 2025
Don't buy business class. It"s a relatively short day time flight. and not worth the extra expense. Stick with premium economy.
HeatherFlew with Lufthansa-Aug 2024
They are super strict on carry-on size and weight. I have never seen an airline weigh a carry-on before. If you are flying through Germany, make sure to alott yourself extra time to stand in a giant line for a passport check, even though it was already checked when boarding to Germany (not sure what could have changed with it during the flight!). They had given some of our seats away on our connecting flight because we barely made it to the gate in time for departure.
Verified travelerFlew with Lufthansa-Mar 2024
Avoid Frankfurt and O'Hare if you can. Use Amsterdam as your European hub and Minneapolis or Dallas as your hub in middle America.

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Frankfurt am Main to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Frankfurt am Main to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Frankfurt am Main to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Frankfurt am Main to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Frankfurt am Main to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Frankfurt am Main to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Frankfurt am Main to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Frankfurt am Main to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Frankfurt am Main to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights from Frankfurt am Main to Illinois
Business Class flights from Frankfurt am Main to Illinois
Premium Economy Class flights from Frankfurt am Main to Illinois
Economy Class flights from Frankfurt am Main to Illinois