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$227+ Cheap flights from Chicago (CHI) to Heidelberg, Germany

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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — FRA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Heidelberg are usually found in April or January, booked 89 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Chicago to Heidelberg

Keep the following information in mind while searching for Chicago to Heidelberg flight deals. Data was last updated July 31, 2025.

Round-trip from

$636
(Booking.com)

One-way from

$220
(Booking.com)

Popular in

July

Cheapest in

April

Average price

$1,172
From Chicago (CHI) to Heidelberg
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One-way flight from Chicago (CHI) to Heidelberg
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Highest demand for flights based on searches. 11% potential increase in price ($117 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 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 Chicago to Heidelberg

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

This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/284:55 pmORD - FRA
1 stop20h 25mAer Lingus
Tue 11/1110:45 amFRA - ORD
1 stop14h 10mAer Lingus
Deal found 7/30$636
This Condor 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:45 amORD - FRA
1 stop16h 00mMultiple Airlines
Thu 9/1811:45 amFRA - ORD
1 stop14h 10mMultiple Airlines
Deal found 7/30$638
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/128:15 pmORD - FRA
1 stop13h 40mTAP AIR PORTUGAL
Tue 12/235:45 pmFRA - ORD
1 stop28h 15mTAP AIR PORTUGAL
Deal found 7/30$639
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:15 pmORD - FRA
1 stop17h 30mScandinavian Airlines
Fri 8/223:20 pmFRA - ORD
1 stop31h 50mScandinavian Airlines
Deal found 7/28$646
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/611:45 pmORD - FRA
1 stop30h 55mTurkish Airlines
Wed 8/1311:25 amFRA - ORD
1 stop29h 15mTurkish Airlines
Deal found 7/29$661
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2410:30 pmORD - FRA
Nonstop8h 35mLufthansa
Tue 9/910:50 amFRA - ORD
Nonstop9h 05mLufthansa
Deal found 7/31$693
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2012:48 pmMDW - FRA
1 stop13h 07mKLM
Tue 11/49:50 amFRA - MDW
1 stop19h 24mKLM
Deal found 7/30$850
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2010:35 amMDW - FRA
2 stops16h 15mVirgin Atlantic
Tue 11/49:50 amFRA - MDW
1 stop19h 24mVirgin Atlantic
Deal found 7/30$871
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1112:43 pmMDW - FRA
1 stop13h 12mDelta
Fri 8/2210:40 amFRA - MDW
1 stop14h 07mDelta
Deal found 7/31$931
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/39:35 amMDW - FRA
2 stops20h 05mMultiple Airlines
Tue 9/99:40 pmFRA - MDW
3 stops25h 44mMultiple Airlines
Deal found 7/30$949

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Heidelberg 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 Chicago to Heidelberg that are best for you.

Fly from

Chicago

Fly to

Heidelberg

Route

Depart

Return

Price

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Tue 10/28

4:55 pm-7:20 pm

1 stop20h 25m

Frankfurt am Main

Tue 11/11

10:45 am-5:55 pm

1 stop14h 10m

$636

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Mon 9/15

6:45 am-5:45 am

1 stop16h 00m

Frankfurt am Main

Thu 9/18

11:45 am-6:55 pm

1 stop14h 10m

$638

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Mon 8/11

7:15 pm-7:45 pm

1 stop17h 30m

Frankfurt am Main

Fri 8/22

3:20 pm-4:10 pm

1 stop31h 50m

$646

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Wed 8/6

11:45 pm-1:40 pm

1 stop30h 55m

Frankfurt am Main

Wed 8/13

11:25 am-9:40 am

1 stop29h 15m

$661

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Sun 8/17

6:00 pm-10:20 pm

1 stop21h 20m

Frankfurt am Main

Thu 8/28

6:05 am-12:50 pm

1 stop13h 45m

$671

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Sun 8/24

10:15 pm-1:00 pm

1 stop31h 45m

Frankfurt am Main

Tue 9/9

2:00 pm-6:15 pm

1 stop11h 15m

$682

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Sun 8/24

10:30 pm-2:05 pm

Nonstop8h 35m

Frankfurt am Main

Tue 9/9

10:50 am-12:55 pm

Nonstop9h 05m

$693

ChicagoFrankfurt am Main

ORD - FRA

ORDFRA

Chicago O'Hare Intl

Tue 8/12

4:30 pm-10:35 pm

1 stop23h 05m

Frankfurt am Main

Fri 8/22

6:30 am-6:50 pm

1 stop19h 20m

$711

ChicagoFrankfurt am Main

MDW - FRA

MDWFRA

Chicago Midway

Mon 10/20

12:48 pm-8:55 am

1 stop13h 07m

Frankfurt am Main

Tue 11/4

9:50 am-10:14 pm

1 stop19h 24m

$850

ChicagoFrankfurt am Main

MDW - FRA

MDWFRA

Chicago Midway

Mon 10/20

10:35 am-9:50 am

2 stops16h 15m

Frankfurt am Main

Tue 11/4

9:50 am-10:14 pm

1 stop19h 24m

$871

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 21 results
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Best time to book a flight from Chicago to Heidelberg

Have a flexible travel schedule? Discover the best time to fly to Heidelberg from Chicago 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 Chicago to Heidelberg

How far ahead should I book a flight from Chicago to Heidelberg?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Heidelberg. Price data was last updated on July 25, 2025.

The best time to book flights from Chicago to Heidelberg is 89 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to Heidelberg?

Currently, January is the cheapest month in which you can book a flight from Chicago to Heidelberg (average of $729). Flying from Chicago to Heidelberg in June is currently the most expensive (average of $1,088). 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 CHI to HE1?

Find hourly flight availability from Chicago to Heidelberg. 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 Chicago to Heidelberg, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Chicago to Heidelberg?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Heidelberg. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Heidelberg flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Heidelberg

Explore weekly flight availability from Chicago to Heidelberg. 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 CHI to HE1 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).

Reviews of airlines servicing Heidelberg

Get insights into the airlines that provide service to Heidelberg. 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 Heidelberg. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Singapore Airlines, Delta, and KLM from Chicago to Heidelberg to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Singapore Airlines
8.1
Very good
1,338 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Delta
8.0
Very good
7,981 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
KLM
7.8
Good
1,383 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Air France
7.5
Good
1,465 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
United Airlines
7.4
Good
8,900 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Food

7.7

Overall

8.1

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Related info for your journey

Find useful and relevant information for your journey from Chicago to Heidelberg. 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 Chicago to Heidelberg one-way?

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $220. Users have also found prices from $361 and $363 on Singapore Airlines and Scandinavian Airlines, respectively.

  • What are the most reliable airlines from Chicago to Heidelberg?

    No one likes to see their flight delayed. When booking a flight from Chicago to Heidelberg consider choosing Lufthansa (63%), Air Canada (57%) or United Airlines (57%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chicago to Heidelberg?

    Looking at all options, your cheapest flight can be booked for $440. While the most popular route (Chicago O'Hare Intl - Frankfurt am Main) can be booked for $545 on average our data indicates $2,772 when flying from Chicago to Heidelberg.

  • Can I find deals for flights from Chicago to Heidelberg that include hotel bookings?

    Yes. In addition to deals on Chicago to Heidelberg flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Heidelberg?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Heidelberg.

  • Can I find deals for business class flights from Chicago to Heidelberg?

    Yes. Cheapflights offers flight deals from Chicago to Heidelberg 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 Chicago to Heidelberg?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Heidelberg (average of $729). Flying from Chicago to Heidelberg in June is currently the most expensive (average of $1,088). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Chicago to Heidelberg

Discover the top 10 airlines that operate flights from Chicago to Heidelberg. 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$208Average$881FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$264Average$639FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$453Average$692FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$485Average$823FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$505Average$842FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$565Average$774FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$591Average$842FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$603Average$898FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$609Average$725FlexibilityNo cancel feeOn-time77%
LOTCheapest$698Average$999FlexibilityNo cancel feeOn-time81%

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