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Heidelberg

$422+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FRA
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap 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 February 3, 2026.

This Billigflug deal was found by Cheapflights users on 2/1. 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.
Mon 2/235:00 am
ONT
-
FRA
1 stop19h 20m
Air Canada
Mon 3/911:10 am
FRA
-
ONT
1 stop33h 39m
Air Canada
Deal found 2/1$878
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Tue 3/176:15 am
ONT
-
FRA
2 stops20h 50m
United Airlines
Sun 4/269:55 am
FRA
-
ONT
2 stops45h 31m
United Airlines
Deal found 2/2$901
This American Airlines deal was found by Cheapflights users on 2/1. 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 2/167:00 am
ONT
-
FRA
1 stop15h 15m
American Airlines
Mon 3/210:15 am
FRA
-
ONT
1 stop17h 27m
American Airlines
Deal found 2/1$906
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 3/96:15 am
ONT
-
FRA
1 stop19h 20m
United Airlines
Thu 4/165:05 pm
FRA
-
ONT
2 stops38h 21m
United Airlines
Deal found 2/3$907
This Air Canada deal was found by Cheapflights users on 2/1. 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 5/56:00 am
ONT
-
FRA
2 stops17h 05m
Multiple Airlines
Fri 5/159:55 am
FRA
-
ONT
3 stops43h 41m
Multiple Airlines
Deal found 2/1$912
This American Airlines deal was found by Cheapflights users on 2/3. 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 2/187:00 am
ONT
-
FRA
1 stop15h 15m
American Airlines
Wed 3/410:50 am
FRA
-
ONT
1 stop17h 55m
American Airlines
Deal found 2/3$913
This Iberia deal was found by Cheapflights users on 2/1. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/277:00 am
ONT
-
FRA
1 stop15h 15m
Iberia
Thu 3/1210:15 am
FRA
-
ONT
1 stop20h 15m
Iberia
Deal found 2/1$915
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/101:50 pm
ONT
-
FRA
2 stops16h 15m
United Airlines
Thu 3/1912:50 pm
FRA
-
ONT
1 stop17h 28m
United Airlines
Deal found 2/3$919

Find flight deals from Ontario to Heidelberg

Keep the following information in mind while searching for Ontario to Heidelberg flight deals. Data was last updated February 3, 2026.

Round-trip from

$878
(Billigflug)

One-way from

$422
(oojo)

Popular in

June

Cheapest in

October

Average price

$745
From Ontario to Heidelberg
Search Deals
One-way flight from Ontario to Heidelberg
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($337 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 3, 2026.
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

Tue 5/5

7:00 am-12:05 pm

2 stops20h 05m

Frankfurt am Main

Fri 5/15

9:55 am-8:36 pm

2 stops43h 41m

$901

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 3/17

6:15 am-11:05 am

2 stops20h 50m

Frankfurt am Main

Sun 4/26

9:55 am-10:26 pm

2 stops45h 31m

$901

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Mon 3/9

6:15 am-11:05 am

2 stops20h 50m

Frankfurt am Main

Thu 4/16

5:05 pm-10:26 pm

2 stops38h 21m

$904

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 3/10

1:50 pm-2:05 pm

2 stops16h 15m

Frankfurt am Main

Thu 3/19

12:50 pm-10:18 pm

1 stop17h 28m

$919

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 3/18

1:40 pm-4:05 pm

2 stops18h 25m

Frankfurt am Main

Wed 3/25

1:50 pm-10:36 pm

1 stop16h 46m

$921

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 3/17

5:15 am-9:20 am

1 stop20h 05m

Frankfurt am Main

Wed 4/1

1:55 pm-9:50 pm

1 stop16h 55m

$924

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 3/10

1:40 pm-2:55 pm

1 stop17h 15m

Frankfurt am Main

Tue 4/14

12:40 pm-10:26 pm

1 stop18h 46m

$924

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Mon 3/23

1:40 pm-2:55 pm

1 stop17h 15m

Frankfurt am Main

Wed 4/1

1:55 pm-9:50 pm

1 stop16h 55m

$924

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 3/24

1:50 pm-11:30 am

1 stop13h 40m

Frankfurt am Main

Thu 4/2

12:55 pm-10:45 pm

1 stop18h 50m

$924

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 2/10

11:02 pm-11:25 am

2 stops27h 23m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 17 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 $528). Flying from Ontario to Heidelberg in June is currently the most expensive (average of $743). 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.

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 February 3, 2026.
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
9,236 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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
7,712 reviews
United Airlines
7.4
Good
9,236 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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 20h 05m. 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 $528). Flying from Ontario to Heidelberg in June is currently the most expensive (average of $743). 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$700Average$875FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$719Average$934FlexibilityNo cancel feeOn-time70%

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