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Heidelberg

$394+ Cheap flights from Ontario (ONT) 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FRA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Ontario to Heidelberg

Cheapest flights from Ontario to Heidelberg
Explore the most affordable flight options available from Ontario to Heidelberg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Billigflug deal was found by Cheapflights users on 10/30. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:05 amONT - FRA
1 stop19h 15mAir Canada
Wed 11/195:25 pmFRA - ONT
1 stop14h 26mAir Canada
Deal found 10/30$680
This Billigflug deal was found by Cheapflights users on 10/29. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:05 amONT - FRA
1 stop19h 15mAir Canada
Tue 11/185:25 pmFRA - ONT
1 stop28h 12mAir Canada
Deal found 10/29$682
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:00 amONT - FRA
2 stops27h 05mUnited Airlines
Fri 12/59:45 amFRA - ONT
3 stops46h 04mUnited Airlines
Deal found 10/29$691
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/255:05 amONT - FRA
2 stops17h 20mAir Canada
Fri 12/55:10 pmFRA - ONT
2 stops36h 32mAir Canada
Deal found 10/29$701
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:05 amONT - FRA
2 stops45h 05mAir Canada
Sun 12/75:10 pmFRA - ONT
2 stops36h 32mAir Canada
Deal found 10/30$708
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:10 amONT - FRA
1 stop16h 05mAmerican Airlines
Tue 11/2510:15 amFRA - ONT
1 stop17h 07mAmerican Airlines
Deal found 10/29$709
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:34 pmONT - FRA
1 stop12h 56mUnited Airlines
Mon 1/125:25 pmFRA - ONT
1 stop14h 28mUnited Airlines
Deal found 10/28$710
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/299:35 pmONT - FRA
2 stops52h 35mAir Canada
Sun 12/710:05 amFRA - ONT
2 stops43h 37mAir Canada
Deal found 10/30$713
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:00 amONT - FRA
2 stops19h 05mUnited Airlines
Fri 12/58:40 amFRA - ONT
2 stops23h 09mUnited Airlines
Deal found 10/30$714
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:05 amONT - FRA
1 stop16h 35mDelta
Fri 12/59:50 amFRA - ONT
1 stop18h 49mDelta
Deal found 10/29$717
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:05 amONT - FRA
1 stop16h 35mDelta
Thu 11/139:50 amFRA - ONT
1 stop18h 52mDelta
Deal found 10/30$718

Cheap flight deals from Ontario to Heidelberg

Keep the following information in mind while searching for Ontario to Heidelberg flight deals. Data was last updated October 30, 2025.

Round-trip from

$680
(Billigflug)

One-way from

$394
(Kiwi.com)

Popular in

May

Cheapest in

October

Average price

$707
From Ontario to Heidelberg
Search Deals
One-way flight from Ontario to Heidelberg
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($311 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 October 30, 2025.
Use the filters below to find and compare flights from Ontario to Heidelberg that are best for you.

Fly from

Ontario

Fly to

Heidelberg

Route

Depart

Return

Price

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 12/3

1:34 pm-11:30 am

1 stop12h 56m

Frankfurt am Main

Mon 1/12

5:25 pm-10:53 pm

1 stop14h 28m

$710

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Fri 11/28

6:10 am-7:15 am

1 stop16h 05m

Frankfurt am Main

Fri 12/5

10:50 am-7:39 pm

1 stop17h 49m

$710

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Sun 3/1

5:00 am-9:20 am

1 stop19h 20m

Frankfurt am Main

Sun 3/15

8:40 am-10:15 pm

1 stop21h 35m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 11/19

7:00 am-7:15 am

1 stop15h 15m

Frankfurt am Main

Wed 12/3

10:50 am-7:39 pm

1 stop17h 49m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 11/12

1:33 pm-11:30 am

1 stop12h 57m

Frankfurt am Main

Wed 11/26

11:30 am-10:51 pm

2 stops20h 21m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 2/25

6:10 am-7:15 am

1 stop16h 05m

Frankfurt am Main

Thu 3/5

10:15 am-6:40 pm

1 stop17h 25m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Mon 12/1

7:00 am-7:25 am

1 stop15h 25m

Frankfurt am Main

Tue 12/9

1:10 pm-8:42 pm

1 stop16h 32m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Sun 11/9

7:00 am-6:35 am

1 stop14h 35m

Frankfurt am Main

Tue 11/18

11:30 am-10:51 pm

2 stops20h 21m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 1/27

6:00 am-9:35 am

1 stop18h 35m

Frankfurt am Main

Tue 2/10

11:10 am-8:58 pm

1 stop18h 48m

$717

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Thu 4/2

7:00 am-2:05 pm

1 stop22h 05m

Frankfurt am Main

Mon 4/6

8:50 am-10:26 pm

1 stop22h 36m

$717

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 20 results
1
2

Best time to book a flight from Ontario to Heidelberg

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

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Heidelberg (average of $465). Flying from Ontario to Heidelberg in June is currently the most expensive (average of $775). 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 ONT to HE1?

Find hourly flight availability from Ontario 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 October 30, 2025.

One of the essential ways to save on airfare from Ontario to Heidelberg is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 35% on airfare.

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 October 30, 2025.
Read through reviews of airlines operating flights from Ontario to Heidelberg, such as United Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,996 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,996 reviews
United Airlines
7.4
Good
8,996 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,488 reviews
United Airlines
7.4
Good
8,996 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Heidelberg?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Heidelberg. On average, Ontario has 0 outbound flights to Heidelberg per day from 2 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Ontario to Heidelberg?

    There are many flights that can get you from Ontario to Heidelberg in 12h 56m. Fly via United Airlines to get the fastest option. There are 5757 mi between Ontario and Heidelberg.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Heidelberg (average of $465). Flying from Ontario to Heidelberg in June is currently the most expensive (average of $775). 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

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Top 2 airlines flying from Ontario to Heidelberg

Discover the top 2 airlines that operate flights from Ontario 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$712Average$907FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$719Average$830FlexibilityNo cancel feeOn-time70%

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