$450 Find Cheap Flights from Frankfurt am Main to Illinois

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 8/27. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Frankfurt am Main to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Frankfurt am Main to Illinois, as well as popular online travel agencies
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Flight Deals

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, Aug 19 - Tue, Sep 8
British Airways Logo
9:20 am - 4:25 pm
FRA
-
STL
14h 05m
1 stop
British Airways Logo
10:22 am - 7:20 am
STL
-
FRA
13h 58m
1 stop
$679British Airways
Thu, Sep 17 - Fri, Oct 16
British Airways Logo
9:20 am - 7:30 pm
FRA
-
STL
17h 10m
1 stop
British Airways Logo
12:52 pm - 7:20 am
STL
-
FRA
11h 28m
1 stop
$716British Airways
Thu, Sep 17 - Fri, Oct 16
KLM Logo
2:15 pm - 11:36 pm
FRA
-
STL
16h 21m
2 stops
KLM Logo
10:45 am - 9:50 am
STL
-
FRA
16h 05m
1 stop
$721KLM
Wed, Aug 19 - Tue, Sep 8
Delta Logo
7:00 am - 11:21 pm
FRA
-
STL
23h 21m
2 stops
Delta Logo
10:29 am - 11:25 am
STL
-
FRA
17h 56m
2 stops
$728Delta
Mon, Nov 2 - Mon, Nov 30
Delta Logo
6:55 am - 11:18 pm
FRA
-
STL
23h 23m
2 stops
Delta Logo
2:18 pm - 2:20 pm
STL
-
FRA
17h 02m
2 stops
$733Delta
Sun, Aug 9 - Sat, Aug 22
KLM Logo
11:00 am - 6:33 pm
FRA
-
MDW
14h 33m
1 stop
KLM Logo
1:27 pm - 11:05 am
MDW
-
FRA
14h 38m
2 stops
$788KLM
Fri, Nov 6 - Fri, Nov 13
Lufthansa Logo
7:20 am - 12:40 pm
FRA
-
ORD
12h 20m
1 stop
Lufthansa Logo
10:35 pm - 1:45 pm
ORD
-
FRA
8h 10mnonstop
$790Lufthansa
Mon, Aug 10 - Sun, Aug 23
United Airlines Logo
12:40 pm - 2:55 pm
FRA
-
ORD
9h 15mnonstop
United Airlines Logo
6:30 pm - 9:55 am
ORD
-
FRA
8h 25mnonstop
$791United Airlines
Sun, Oct 18 - Fri, Oct 30
United Airlines Logo
6:35 am - 12:35 pm
FRA
-
ORD
13h 00m
1 stop
United Airlines Logo
5:20 pm - 7:30 am
ORD
-
FRA
8h 10mnonstop
$792United Airlines
Tue, Aug 11 - Fri, Aug 21
Lufthansa Logo
8:50 am - 11:00 am
FRA
-
ORD
9h 10mnonstop
Lufthansa Logo
3:10 pm - 6:30 am
ORD
-
FRA
8h 20mnonstop
$797Lufthansa
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 August.

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 $709 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 $709.

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 $853 on average. Morning departures are around 2% cheaper than evening flights, on average. 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 $870.

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 September, when tickets cost $330 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of round-trip tickets is $1,184 and $529 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 3 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Cheapest flight$450
Flight from Frankfurt am Main to St. Louis

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 
KEVINFlew with Lufthansa
FRA
-
ORD
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
FRA
-
ORD
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
FRA
-
ORD
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.

Reviews of the top airlines flying from Frankfurt am Main to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Frankfurt am Main to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Frankfurt am Main to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9865 reviews
7.7Boarding
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
Airline reviews

For my wife to be seated with our two children they put them in the last row on the plane where the seats don’t recline very much. The seats in front of them reclined fully which is basically in the lap of the last row which made it difficult to eat, move or watch the entertainment provided.

8.0 ExcellentRobert, Jun 2026
FRA - PRG
Read more United Airlines reviews

For my wife to be seated with our two children they put them in the last row on the plane where the seats don’t recline very much. The seats in front of them reclined fully which is basically in the lap of the last row which made it difficult to eat, move or watch the entertainment provided.

The seats were very nice in premium economy. The service was good. The flight was slightly bumpy. Would have appreciated more updates from the pilots.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

I flew from Barcelona to Chicago on UA yesterday. The flight was on time, the pilots did a great job and the flight attendants were super nice. All of them. Also food was good, and the drinks, including wine were served a few times during our flight. I highly recommend this airline.

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

Too tight connection. Lufthansa staff pulled 12 of us out of passport control that had tight connections and took us about 1/3 mile AWAY from our gates and put us in another slow, long line. Needless to say all of us missed our flights and the Customer “Service” staff was rude and not helpful at all. Was rebooked from a direct flight to one w a 6hr layover. Asked about an other option that was on my app and was told to book it myself online (which would be $300 extra pp!!). Got rebooked again w a tight connection which was also missed. Rebooked into middle seats that didn’t recline for 9 hr flight!! No compensation (and we paid for seats!) Ended up taking 26hrs to get home from Europe to North Carolina! No longer a fan of Lufthansa—2nd time having these kind of issues w them!

The food on this flight was better than what we had getting to Rome. The flight was comfortable and the staff was great. One of the staff members was a stickler about the blankets in the aisle, which I get, but still. Overall, great flight and will fly with them again!

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

The flight attendants were wonderful - one man put my carry on in the bin for me. Very attentive service. Loved the blanket and pillow waiting for me in economy. Food was excellent which is a surprise given the reputation of any airline food. Wine was fine with the meals. Delighted with the new movies - flight went by very quickly. I would definitely fly Lufthansa again.

My flight was cancelled, but it was not Kayak's fault. Kayak did require me to pay for the ticket twice to two different venders who paid Lufthansa. Kayak/Lufthansa owes me for the first booking I made first was fraudulent on the part of the subcontracting ticket seller. There will be litigation over this issue under the current passenger protection laws.

flight was half full, plenty of empty seats, was able to lie down across 4 seats, food was good, arrived on time

Generally good. Not their fault but the design of the Boeing 747 had seating supports directly in line with my legs. So my legs always had to straddle this support which caused body misallignment. Such poor design from Boeing. There was no USB port for me to charge my phone. The screen touch control was very poor.

I like crew. They are friendly. The flight was delayed to take off for 1hr and that caused panic at Houston Airport to catch connecting flight due to security check delay. If it has reached on time I would have sufficient time in collecting bags and security check

How about changing the personal out to more friendly human beings? This team was pretty arrogant. No fun!!

It was good. The seats in economy weren’t bad

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.