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$417+ Cheap flights from Frankfurt (FRA) to Ontario (ONT)

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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
FRA — ONT
Nov 9 — Nov 161
Sun 11/9
Sun 11/16
1 adult, Economy
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Find flight deals from Frankfurt to Ontario

Cheapest flights from Frankfurt to Ontario
Explore the most affordable flight options available from Frankfurt to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.

This Billigflug deal was found by Cheapflights users on 10/8. 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 11/1710:15 amFRA - ONT
1 stop17h 06mMultiple Airlines
Mon 11/243:19 pmONT - FRA
2 stops21h 36mMultiple Airlines
Deal found 10/8$637
This American Airlines deal was found by Cheapflights users on 10/8. 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 11/310:15 amFRA - ONT
1 stop17h 06mAmerican Airlines
Sun 11/167:00 amONT - FRA
1 stop15h 15mAmerican Airlines
Deal found 10/8$654
This British Airways deal was found by Cheapflights users on 10/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:15 amFRA - ONT
1 stop17h 06mBritish Airways
Sun 11/167:00 amONT - FRA
1 stop15h 15mBritish Airways
Deal found 10/8$655
This Expedia deal was found by Cheapflights users on 10/7. 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.
Thu 10/1610:55 amFRA - ONT
1 stop17h 07mBritish Airways
Thu 10/238:15 amONT - FRA
1 stop15h 30mBritish Airways
Deal found 10/7$668
This lol.travel deal was found by Cheapflights users on 10/8. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:15 amFRA - ONT
1 stop17h 06mBritish Airways
Tue 11/187:00 amONT - FRA
1 stop15h 15mBritish Airways
Deal found 10/8$669
This Iberia deal was found by Cheapflights users on 10/8. 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.
Wed 10/2210:55 amFRA - ONT
1 stop20h 47mMultiple Airlines
Wed 10/2910:57 amONT - FRA
2 stops19h 08mMultiple Airlines
Deal found 10/8$670
This Expedia deal was found by Cheapflights users on 10/7. 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.
Thu 11/610:15 amFRA - ONT
1 stop17h 07mBritish Airways
Wed 11/196:10 amONT - FRA
1 stop16h 05mBritish Airways
Deal found 10/7$671
This Expedia deal was found by Cheapflights users on 10/7. 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.
Sat 11/810:50 amFRA - ONT
1 stop19h 21mBritish Airways
Sat 11/157:00 amONT - FRA
1 stop15h 15mBritish Airways
Deal found 10/7$674
This Billigflug deal was found by Cheapflights users on 10/9. 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 11/1410:15 amFRA - ONT
1 stop36h 47mMultiple Airlines
Fri 2/2711:05 amONT - FRA
2 stops19h 35mMultiple Airlines
Deal found 10/9$675
This Expedia deal was found by Cheapflights users on 10/7. 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.
Thu 10/2310:55 amFRA - ONT
1 stop17h 07mBritish Airways
Thu 10/308:15 amONT - FRA
1 stop15h 00mBritish Airways
Deal found 10/7$676
This Expedia deal was found by Cheapflights users on 10/8. 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.
Wed 10/2210:55 amFRA - ONT
1 stop17h 08mBritish Airways
Sun 10/266:10 amONT - FRA
1 stop17h 05mBritish Airways
Deal found 10/8$677

Cheap flight deals from Frankfurt to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Frankfurt (FRA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$637
(Billigflug)

One-way from

$417
(flugladen.de)

Popular in

December

Cheapest in

February

Average price

$752
Provider with most accurate pricing for Frankfurt am Main-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Frankfurt am Main-Ontario flights.
Search Deals
From Frankfurt am Main to Ontario
Search Deals
One-way flight from Frankfurt am Main to Ontario
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($310 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Frankfurt to Ontario 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 10, 2025.
Use the filters below to find and compare flights from Frankfurt am Main Airport to Ontario that are best for you.

Fly from

Frankfurt

Fly to

Ontario

Route

Depart

Return

Price

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/14

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Fri 2/20

5:03 pm-10:00 pm

2 stops19h 57m

$668

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Tue 2/17

10:50 am-8:24 pm

1 stop18h 34m

Ontario

Sat 2/21

11:55 pm-7:15 am

1 stop22h 20m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Tue 2/17

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Tue 2/24

6:00 am-7:15 am

1 stop16h 15m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Fri 2/13

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Sat 2/21

11:55 pm-7:15 am

1 stop22h 20m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 2/19

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Mon 2/23

11:55 pm-7:15 am

1 stop22h 20m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Tue 2/17

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Sun 2/22

6:00 am-7:15 am

1 stop16h 15m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sun 2/15

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Sat 2/21

6:47 am-7:15 am

1 stop15h 28m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Mon 2/16

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Tue 2/24

6:00 am-7:15 am

1 stop16h 15m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sun 2/15

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Mon 2/23

6:00 am-7:15 am

1 stop16h 15m

$680

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Mon 2/16

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Sun 2/22

6:47 am-7:15 am

1 stop15h 28m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 23 results
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Compare providers for flights from Frankfurt to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Frankfurt to Ontario in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Frankfurt am Main Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Frankfurt am Main Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Frankfurt am Main Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Frankfurt am Main Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Frankfurt am Main Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Frankfurt to Ontario

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

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

Currently, March is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $510). Flying from Frankfurt am Main Airport to Ontario in July is currently the most expensive (average of $668). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 10, 2025.
Get a feel of what it's like to fly with United Airlines from Frankfurt am Main Airport to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,968 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,968 reviews
United Airlines
7.4
Good
8,968 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Frankfurt to Ontario. 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 into for flights to Ontario from Frankfurt am Main?

    For a flight from Frankfurt am Main to Ontario, you will be flying into Ontario. Ontario (ONT) is just 3.1 mi from the center of the city. Ontario is the only Ontario airport and it handles 0 inbound flights from Frankfurt am Main per day. 1 airline has flights to Ontario from Frankfurt am Main on a regular basis.

  • How long is the flight from Frankfurt am Main Airport to Ontario?

    British Airways can get you from Frankfurt am Main Airport to Ontario in just under 16h 36m. Your travel time can differ by up to . Frankfurt am Main Airport and Ontario are separated by a distance of 5757 mi.

  • What is the cheapest airline to fly from Frankfurt am Main Airport to Ontario round-trip?

    Currently priced at $909, United Airlines will fly you from Frankfurt am Main Airport to Ontario and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Frankfurt to Ontario 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 Airport to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $510). Flying from Frankfurt am Main Airport to Ontario in July is currently the most expensive (average of $668). 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 airline flying from Frankfurt to Ontario

Discover the top airline that operate flights from Frankfurt to Ontario. 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 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$909Average$1,407FlexibilityNo cancel feeOn-time69%

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