HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heidelberg

$470+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FRA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Heidelberg with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 12/315:05 amONT - FRA
1 stop19h 15mUnited Airlines
Fri 1/911:10 amFRA - ONT
1 stop18h 48mUnited Airlines
Deal found 12/16$1,026
This Finnair deal was found by Cheapflights users on 12/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:10 amONT - FRA
1 stop15h 05mMultiple Airlines
Wed 12/3110:50 amFRA - ONT
1 stop19h 08mMultiple Airlines
Deal found 12/16$1,222
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/296:04 amONT - FRA
1 stop20h 36mUnited Airlines
Tue 1/61:50 pmFRA - ONT
2 stops30h 28mUnited Airlines
Deal found 12/15$1,270
This Finnair deal was found by Cheapflights users on 12/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:10 amONT - FRA
1 stop16h 05mMultiple Airlines
Tue 1/610:15 amFRA - ONT
1 stop17h 30mMultiple Airlines
Deal found 12/16$1,579
This Iberia deal was found by Cheapflights users on 12/16. 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.
Thu 12/257:10 amONT - FRA
1 stop15h 05mIberia
Mon 1/57:35 pmFRA - ONT
2 stops36h 13mIberia
Deal found 12/16$1,598
This Finnair deal was found by Cheapflights users on 12/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:10 amONT - FRA
2 stops17h 40mMultiple Airlines
Mon 1/510:50 amFRA - ONT
2 stops20h 24mMultiple Airlines
Deal found 12/16$1,641
This oojo deal was found by Cheapflights users on 12/16. 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.
Wed 12/317:10 amONT - FRA
1 stop15h 05mBritish Airways
Fri 1/97:00 amFRA - ONT
2 stops19h 22mBritish Airways
Deal found 12/16$1,651
This Icelandair deal was found by Cheapflights users on 12/17. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:30 amONT - FRA
2 stops18h 35mMultiple Airlines
Tue 1/131:05 pmFRA - ONT
2 stops17h 40mMultiple Airlines
Deal found 12/17$1,657
This flugladen.de deal was found by Cheapflights users on 12/16. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:10 amONT - FRA
1 stop15h 05mMultiple Airlines
Mon 1/121:55 pmFRA - ONT
1 stop19h 01mMultiple Airlines
Deal found 12/16$1,725
This Mytrip deal was found by Cheapflights users on 12/17. 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.
Thu 12/2512:42 amONT - FRA
2 stops27h 03mMultiple Airlines
Mon 1/510:30 amFRA - ONT
1 stop17h 14mMultiple Airlines
Deal found 12/17$1,831

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 December 18, 2025.

Round-trip from

$684
(Billigflug)

One-way from

$470
(Expedia)

Popular in

May

Cheapest in

October

Average price

$972
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 ($303 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 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

Mon 1/12

10:30 pm-8:40 am

1 stop25h 10m

Frankfurt am Main

Tue 1/27

9:50 am-11:31 am

1 stop34h 41m

$711

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Mon 2/9

5:05 am-9:20 am

1 stop19h 15m

Frankfurt am Main

Wed 2/25

5:25 pm-10:57 pm

1 stop14h 32m

$711

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Mon 2/9

10:30 pm-8:40 am

1 stop25h 10m

Frankfurt am Main

Wed 2/25

9:50 am-12:02 pm

1 stop35h 12m

$711

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 2/10

8:00 am-9:00 am

1 stop16h 00m

Frankfurt am Main

Fri 2/27

1:50 pm-9:59 pm

1 stop17h 09m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Fri 1/23

6:00 am-9:20 am

1 stop18h 20m

Frankfurt am Main

Sat 1/31

10:10 am-10:53 pm

1 stop21h 43m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Sun 2/8

6:10 am-9:00 am

1 stop17h 50m

Frankfurt am Main

Tue 2/24

10:10 am-5:41 pm

1 stop16h 31m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 2/10

8:00 am-9:00 am

1 stop16h 00m

Frankfurt am Main

Mon 2/23

10:10 am-5:41 pm

1 stop16h 31m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Sun 2/8

6:00 am-9:35 am

1 stop18h 35m

Frankfurt am Main

Mon 2/23

10:10 am-5:41 pm

1 stop16h 31m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Wed 2/11

6:00 am-9:35 am

1 stop18h 35m

Frankfurt am Main

Fri 2/27

10:10 am-5:41 pm

1 stop16h 31m

$720

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Sat 1/17

4:45 pm-6:20 pm

2 stops16h 35m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 19 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 $369). 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 December 18, 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 December 18, 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
9,093 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

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
9,093 reviews
United Airlines
7.4
Good
9,093 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

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
7,585 reviews
United Airlines
7.4
Good
9,093 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

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 19h 15m. Fly via Delta or United Airlines to get the fastest option. There are 5757 mi between Ontario and Heidelberg. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $369). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Heidelberg

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Frankfurt flights
San Francisco to Frankfurt flights
San Francisco to Munich flights
Los Angeles to Munich flights
Ontario to Frankfurt flights
Santa Ana to Frankfurt flights
San Diego to Munich flights
Las Vegas to Frankfurt flights
Oakland to Munich flights
San Jose to Munich flights
Burbank to Frankfurt flights
San Jose to Frankfurt flights
San Diego to Frankfurt flights
Ontario to Munich flights
Oakland to Frankfurt flights
Santa Ana to Munich flights
Sacramento to Frankfurt flights
Long Beach to Frankfurt flights
Burbank to Munich flights
Los Angeles to Stuttgart flights
Las Vegas to Munich flights
Reno to Frankfurt flights
San Diego to Stuttgart flights
Las Vegas to Stuttgart flights
San Francisco to Stuttgart flights
Reno to Munich flights
Sacramento to Munich flights
San Luis Obispo to Munich flights
Fresno to Frankfurt flights
San Jose to Stuttgart flights
Ontario to Stuttgart flights
San Luis Obispo to Frankfurt flights
Medford to Frankfurt flights
Santa Barbara to Frankfurt flights
Monterey to Munich flights
Monterey to Frankfurt flights
Oakland to Stuttgart flights
Fresno to Munich flights
Santa Ana to Stuttgart flights
Sacramento to Stuttgart flights
Long Beach to Munich flights
Redding to Munich flights
San Jose to Friedrichshafen flights
Santa Rosa to Munich flights
Bakersfield to Munich flights
Santa Barbara to Munich flights
Reno to Stuttgart flights
Monterey to Stuttgart flights
Medford to Munich flights
Burbank to Stuttgart flights

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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$700Average$809FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$719Average$830FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.