HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$447+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
FRA — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Frankfurt to Ontario 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 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 September 11, 2025.

Round-trip from

$623
(American Airlines)

One-way from

$447
(flugladen.de)

Popular in

December

Cheapest in

February

Average price

$813
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. 20% potential increase in price ($201 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 11, 2025.

This Billigflug deal was found by Cheapflights users on 9/9. 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.
Thu 9/1810:55 amFRA - ONT
1 stop16h 59mMultiple Airlines
Mon 9/2210:53 amONT - FRA
2 stops26h 32mMultiple Airlines
Deal found 9/9$601
This AirNGo deal was found by Cheapflights users on 9/9. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:55 amFRA - ONT
1 stop16h 59mBritish Airways
Wed 10/18:15 amONT - FRA
1 stop15h 30mBritish Airways
Deal found 9/9$611
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/29:20 amFRA - ONT
1 stop20h 51mAmerican Airlines
Sun 10/191:00 pmONT - FRA
2 stops24h 25mAmerican Airlines
Deal found 9/10$625
This British Airways deal was found by Cheapflights users on 9/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:15 amFRA - ONT
1 stop35h 28mBritish Airways
Sat 11/1510:47 amONT - FRA
2 stops26h 13mBritish Airways
Deal found 9/9$626
This ResecentrumGruppen deal was found by Cheapflights users on 9/10. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2410:40 amFRA - ONT
1 stop20h 43mKLM
Wed 10/110:00 pmONT - FRA
1 stop25h 55mKLM
Deal found 9/10$627
This Gotogate deal was found by Cheapflights users on 9/9. 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 Gotogate 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
Fri 10/316:10 amONT - FRA
1 stop17h 05mBritish Airways
Deal found 9/9$628
This ResecentrumGruppen deal was found by Cheapflights users on 9/10. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:40 amFRA - ONT
1 stop20h 42mKLM
Wed 10/297:05 amONT - FRA
1 stop17h 35mKLM
Deal found 9/10$631
This British Airways deal was found by Cheapflights users on 9/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:25 amFRA - ONT
2 stops25h 32mBritish Airways
Sat 11/1512:46 pmONT - FRA
2 stops24h 14mBritish Airways
Deal found 9/9$634
This British Airways deal was found by Cheapflights users on 9/11. 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.
Thu 9/1810:55 amFRA - ONT
1 stop16h 59mBritish Airways
Fri 10/38:15 amONT - FRA
1 stop15h 30mBritish Airways
Deal found 9/11$636
This British Airways deal was found by Cheapflights users on 9/8. 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.
Fri 10/249:20 amFRA - ONT
1 stop21h 13mBritish Airways
Fri 10/316:10 amONT - FRA
1 stop17h 05mBritish Airways
Deal found 9/8$637
This British Airways deal was found by Cheapflights users on 9/10. 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.
Wed 10/19:20 amFRA - ONT
1 stop21h 04mBritish Airways
Tue 10/2111:59 pmONT - FRA
1 stop23h 46mBritish Airways
Deal found 9/10$638

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 September 11, 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

Wed 2/18

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Thu 3/5

6:47 am-2:25 pm

2 stops22h 38m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 2/19

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Thu 3/5

6:47 am-2:25 pm

2 stops22h 38m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/21

10:50 am-8:24 pm

1 stop18h 34m

Ontario

Mon 3/2

6:47 am-3:30 pm

2 stops23h 43m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sun 2/22

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Mon 3/2

11:55 pm-2:10 pm

2 stops29h 15m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 2/19

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Wed 3/4

6:47 am-2:05 pm

2 stops22h 18m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/21

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Wed 3/4

6:47 am-2:05 pm

2 stops22h 18m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Fri 2/20

10:15 am-5:51 pm

1 stop16h 36m

Ontario

Tue 3/3

11:55 pm-2:05 pm

2 stops29h 10m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/21

10:15 am-11:43 pm

1 stop22h 28m

Ontario

Tue 3/3

11:05 am-2:10 pm

2 stops18h 05m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 2/19

10:50 am-8:24 pm

1 stop18h 34m

Ontario

Tue 3/3

11:05 am-2:10 pm

2 stops18h 05m

$624

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Sat 2/21

10:50 am-8:24 pm

1 stop18h 34m

Ontario

Thu 3/5

6:47 am-2:25 pm

2 stops22h 38m

$624

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 23 results
1
2
3

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, August is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $246). Flying from Frankfurt am Main Airport to Ontario in March is currently the most expensive (average of $328). 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 September 11, 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
8,937 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

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 $694, 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 13% 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, August is the cheapest month in which you can book a flight from Frankfurt am Main Airport to Ontario (average of $246). Flying from Frankfurt am Main Airport to Ontario in March is currently the most expensive (average of $328). 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.

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$694Average$1,406FlexibilityNo cancel feeOn-time69%

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.