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$473+ 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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
FRA — ONT
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 November 26, 2025.

This American Airlines deal was found by Cheapflights users on 11/26. 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.
Thu 12/410:15 amFRA - ONT
1 stop17h 03mAmerican Airlines
Mon 12/812:46 pmONT - FRA
2 stops24h 09mAmerican Airlines
Deal found 11/26$667
This Expedia deal was found by Cheapflights users on 11/24. 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.
Tue 12/210:50 amFRA - ONT
1 stop17h 51mBritish Airways
Fri 2/137:10 amONT - FRA
1 stop15h 05mBritish Airways
Deal found 11/24$672
This Expedia deal was found by Cheapflights users on 11/25. 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 12/610:50 amFRA - ONT
1 stop19h 17mBritish Airways
Tue 12/96:00 amONT - FRA
1 stop16h 15mBritish Airways
Deal found 11/25$673
This Expedia deal was found by Cheapflights users on 11/24. 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 12/410:15 amFRA - ONT
1 stop17h 03mBritish Airways
Tue 12/97:00 amONT - FRA
1 stop15h 15mBritish Airways
Deal found 11/24$674
This Finnair deal was found by Cheapflights users on 11/25. 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.
Fri 12/510:50 amFRA - ONT
1 stop17h 49mMultiple Airlines
Tue 12/97:00 amONT - FRA
1 stop15h 15mMultiple Airlines
Deal found 11/25$679
This American Airlines deal was found by Cheapflights users on 11/26. 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.
Fri 12/510:50 amFRA - ONT
1 stop17h 49mAmerican Airlines
Sun 12/1410:34 pmONT - FRA
1 stop25h 16mAmerican Airlines
Deal found 11/26$680
This Finnair deal was found by Cheapflights users on 11/26. 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.
Fri 12/510:15 amFRA - ONT
1 stop21h 13mMultiple Airlines
Sun 12/1411:59 pmONT - FRA
2 stops23h 51mMultiple Airlines
Deal found 11/26$696
This KLM deal was found by Cheapflights users on 11/26. 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.
Thu 12/257:20 pmFRA - ONT
2 stops29h 52mMultiple Airlines
Mon 1/2612:41 pmONT - FRA
2 stops21h 34mMultiple Airlines
Deal found 11/26$700
This American Airlines deal was found by Cheapflights users on 11/25. 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 12/1510:50 amFRA - ONT
1 stop17h 49mAmerican Airlines
Mon 12/297:10 amONT - FRA
1 stop15h 05mAmerican Airlines
Deal found 11/25$702
This American Airlines deal was found by Cheapflights users on 11/26. 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 12/1510:50 amFRA - ONT
1 stop17h 49mAmerican Airlines
Wed 12/2411:59 pmONT - FRA
1 stop23h 51mAmerican Airlines
Deal found 11/26$703
This flugladen.de deal was found by Cheapflights users on 11/25. 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.
Tue 12/210:50 amFRA - ONT
1 stop17h 51mBritish Airways
Tue 12/97:00 amONT - FRA
1 stop15h 15mBritish Airways
Deal found 11/25$704

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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$664
(American Airlines)

One-way from

$473
(Finnair)

Popular in

December

Cheapest in

June

Average price

$814
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. 28% potential increase in price ($318 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 26, 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 2/28

10:15 am-6:39 pm

1 stop17h 24m

Ontario

Mon 3/16

5:02 pm-6:10 pm

2 stops17h 08m

$666

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 3/14

10:50 am-9:24 pm

1 stop18h 34m

Ontario

Mon 4/6

5:02 pm-7:45 pm

2 stops17h 43m

$666

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 3/5

11:25 am-10:29 pm

2 stops20h 04m

Ontario

Mon 3/9

2:47 pm-6:10 pm

2 stops19h 23m

$672

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Mon 2/9

11:35 am-10:48 pm

2 stops20h 13m

Ontario

Thu 2/26

5:06 pm-7:25 pm

2 stops17h 19m

$673

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Wed 2/11

11:25 am-10:48 pm

2 stops20h 23m

Ontario

Thu 2/26

5:06 pm-7:25 pm

2 stops17h 19m

$673

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sun 3/15

10:15 am-6:42 pm

1 stop16h 27m

Ontario

Sat 4/4

7:00 am-8:45 am

1 stop16h 45m

$677

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Wed 3/18

10:15 am-6:42 pm

1 stop16h 27m

Ontario

Wed 4/1

11:58 pm-8:45 am

1 stop23h 47m

$677

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 3/14

10:50 am-9:24 pm

1 stop18h 34m

Ontario

Wed 4/1

11:58 pm-8:45 am

1 stop23h 47m

$677

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/14

10:15 am-6:39 pm

1 stop17h 24m

Ontario

Sun 3/1

7:10 am-7:15 am

1 stop15h 05m

$677

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Wed 2/25

10:15 am-6:39 pm

1 stop17h 24m

Ontario

Thu 3/19

6:00 am-7:15 am

1 stop17h 15m

$677

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 22 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 November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Frankfurt am Main Airport-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, February is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $477). Flying from Frankfurt am Main Airport to Ontario in July is currently the most expensive (average of $667). 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.

How much does it cost to fly round-trip from Frankfurt am Main Airport to Ontario?

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 November 26, 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
9,046 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
9,046 reviews
United Airlines
7.4
Good
9,046 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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 17h 24m. 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 $595, 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. United Airlines is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • 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, February is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $477). Flying from Frankfurt am Main Airport to Ontario in July is currently the most expensive (average of $667). 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 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$595Average$1,456FlexibilityNo cancel feeOn-time69%

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