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$345+ Cheap flights from Frankfurt am Main to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
FRA — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Frankfurt am Main to Illinois

Keep the following information in mind while searching for Frankfurt am Main to Illinois flight deals. Data was last updated July 31, 2025.

Round-trip from

$554
(Expedia)

One-way from

$345
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$874
From Frankfurt am Main to Illinois
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One-way flight from Frankfurt am Main to Illinois
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Highest demand for flights based on searches. 11% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Frankfurt am Main to Illinois

Cheapest flights from Frankfurt am Main to Illinois
Explore the most affordable flight options available from Frankfurt am Main to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Expedia deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:00 pmFRA - ORD
1 stop11h 15mIcelandair
Mon 10/277:30 pmORD - FRA
1 stop10h 35mIcelandair
Deal found 7/29$554
This AirNGo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:55 amFRA - STL
1 stop17h 02mAir Canada
Fri 10/31:30 pmSTL - FRA
1 stop11h 40mAir Canada
Deal found 7/31$555
This Travelis deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/110:50 amFRA - ORD
Nonstop9h 05mLufthansa
Sun 9/1410:30 pmORD - FRA
Nonstop8h 35mLufthansa
Deal found 7/31$556
This Billigflug deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1510:55 amFRA - ORD
1 stop27h 29mMultiple Airlines
Mon 9/1510:35 pmORD - FRA
1 stop14h 10mMultiple Airlines
Deal found 7/31$558
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:30 pmFRA - ORD
1 stop26h 40mScandinavian Airlines
Mon 9/87:15 pmORD - FRA
1 stop17h 30mScandinavian Airlines
Deal found 7/30$560
This AirNGo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1910:40 amFRA - STL
Nonstop9h 50mUnited Airlines
Fri 10/312:25 pmSTL - FRA
1 stop14h 30mUnited Airlines
Deal found 7/31$562
This AirNGo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/110:50 amFRA - ORD
Nonstop9h 05mUnited Airlines
Sun 9/1410:30 pmORD - FRA
Nonstop8h 35mUnited Airlines
Deal found 7/31$563
This Flysmarter deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:50 amFRA - ORD
2 stops15h 40mAir Canada
Fri 11/1412:50 pmORD - FRA
1 stop11h 35mAir Canada
Deal found 7/30$568
This Flighttix deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1910:40 amFRA - STL
Nonstop9h 50mLufthansa
Fri 10/33:30 pmSTL - FRA
Nonstop8h 55mLufthansa
Deal found 7/31$570
This Sembo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:25 pmFRA - STL
1 stop31h 14mMultiple Airlines
Sat 12/274:05 pmSTL - FRA
1 stop31h 35mMultiple Airlines
Deal found 7/31$571
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 amFRA - STL
2 stops17h 52mAmerican Airlines
Mon 12/296:30 pmSTL - FRA
2 stops16h 40mAmerican Airlines
Deal found 7/31$577
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:20 amFRA - ORD
1 stop13h 37mAmerican Airlines
Wed 9/2411:46 amORD - FRA
2 stops23h 29mAmerican Airlines
Deal found 7/31$577

Cheapflights Fare Finder

 
Customize your flight search to find flights from Frankfurt am Main to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Frankfurt am Main to Illinois that are best for you.

Fly from

Frankfurt am Main

Fly to

Illinois

Route

Depart

Return

Price

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Tue 10/21

2:00 pm-6:15 pm

1 stop11h 15m

Chicago O'Hare Intl

Mon 10/27

7:30 pm-12:05 pm

1 stop10h 35m

$554

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 9/19

9:55 am-7:57 pm

1 stop17h 02m

Lambert-St Louis

Fri 10/3

1:30 pm-8:10 am

1 stop11h 40m

$555

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Mon 9/1

10:50 am-12:55 pm

Nonstop9h 05m

Chicago O'Hare Intl

Sun 9/14

10:30 pm-2:05 pm

Nonstop8h 35m

$556

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Fri 8/15

10:55 am-7:24 am

1 stop27h 29m

Chicago O'Hare Intl

Mon 9/15

10:35 pm-7:45 pm

1 stop14h 10m

$558

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Thu 9/4

8:30 pm-4:10 pm

1 stop26h 40m

Chicago O'Hare Intl

Mon 9/8

7:15 pm-7:45 pm

1 stop17h 30m

$560

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 9/19

10:40 am-1:30 pm

Nonstop9h 50m

Lambert-St Louis

Fri 10/3

12:25 pm-9:55 am

1 stop14h 30m

$562

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Mon 9/1

10:50 am-12:55 pm

Nonstop9h 05m

Chicago O'Hare Intl

Sun 9/14

10:30 pm-2:05 pm

Nonstop8h 35m

$563

Frankfurt am MainChicago

FRA - ORD

FRAORD

Frankfurt am Main

Fri 9/5

10:55 am-7:00 pm

1 stop15h 05m

Chicago O'Hare Intl

Thu 9/18

3:45 pm-10:15 am

1 stop11h 30m

$568

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 9/19

10:40 am-1:30 pm

Nonstop9h 50m

Lambert-St Louis

Fri 10/3

3:30 pm-7:25 am

Nonstop8h 55m

$570

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Thu 11/27

5:25 pm-5:39 pm

1 stop31h 14m

Lambert-St Louis

Sat 12/27

4:05 pm-6:40 am

1 stop31h 35m

$571

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 45 results
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Best time to book a flight from Frankfurt am Main to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Frankfurt am Main with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Frankfurt am Main to Illinois?

Currently, August is the cheapest month in which you can book a flight from Frankfurt am Main to Illinois (average of $245). Flying from Frankfurt am Main to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from FRA to IL?

Find hourly flight availability from Frankfurt am Main to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Frankfurt am Main to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Frankfurt am Main to Illinois

Explore weekly flight availability from Frankfurt am Main to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 31, 2025.

The most flights from FK0 to USIL are scheduled on a Tuesday (13 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 on average).

How much does it cost to fly round-trip from Frankfurt am Main to Illinois?

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Frankfurt am Main to Illinois, such as Delta, KLM, and Finnair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from Frankfurt am Main to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Frankfurt am Main to Illinois one-way?

    The cheapest airlines for a one-way flight from Frankfurt am Main to Illinois are TAP AIR PORTUGAL ($380), Aer Lingus ($656), and Lufthansa ($701).

  • What are the most popular routes from Frankfurt am Main to Illinois?

    When deciding which route to take from Frankfurt am Main to Illinois consider Frankfurt am Main - Chicago O'Hare Intl, Frankfurt am Main - Chicago Midway or Frankfurt-Hahn - Chicago O'Hare Intl as they are the most popular.

  • What are the most reliable airlines from Frankfurt am Main to Illinois?

    Before booking your flight to Illinois from Frankfurt am Main, check out the most reliable airlines to get you to your destination on time: Qatar Airways (57%), Lufthansa (57%), Atlas Air( 55%).

  • What are the cheapest flights from Frankfurt am Main to Illinois?

    Looking for the cheapest flight from Frankfurt am Main to Illinois? While on average our users pay $897, our data indicates the cheapest price to be $653. The most popular route (Frankfurt am Main - Chicago O'Hare Intl), is priced around $474.

  • Can I find deals for flights from Frankfurt am Main to Illinois that include hotel bookings?

    Yes. In addition to deals on Frankfurt am Main to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Frankfurt am Main to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Frankfurt am Main to Illinois.

  • Can I find deals for business class flights from Frankfurt am Main to Illinois?

    Yes. Cheapflights offers flight deals from Frankfurt am Main to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Frankfurt am Main to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Frankfurt am Main to Illinois (average of $245). Flying from Frankfurt am Main to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Frankfurt am Main to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Frankfurt am Main to Illinois

Discover the top 5 airlines that operate flights from Frankfurt am Main to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$390Average$568FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$480Average$659FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$524Average$607FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$543Average$721FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$553Average$778FlexibilityNo cancel feeOn-time76%

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