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$578+ Cheap flights from Frankfurt (FRA) to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/18. Fares are subject to change and may not be available on all flights or dates of travel.
FRA — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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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 junio 12, 2025.

Round-trip from

$583
(Booking.com)

Popular in

December

Cheapest in

February

Average price

$779
From Frankfurt am Main to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($166 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
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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 junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/182:15 pmFRA - ONT
2 stops18h 31mDelta
mar. 7/16:00 amONT - FRA
2 stops18h 50mDelta
Deal found 6/11$578
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/2910:55 amFRA - ONT
1 stop16h 29mBritish Airways
dom. 9/78:15 amONT - FRA
1 stop15h 30mBritish Airways
Deal found 6/10$583
This American Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 6/2510:55 amFRA - ONT
1 stop19h 38mAmerican Airlines
vie. 8/226:10 amONT - FRA
2 stops16h 10mAmerican Airlines
Deal found 6/10$586
This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/2512:10 pmFRA - ONT
2 stops19h 38mIberia
dom. 9/78:15 amONT - FRA
1 stop15h 30mIberia
Deal found 6/11$593
This Finnair deal was found by Cheapflights users on 6/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/710:15 amFRA - ONT
1 stop16h 34mMultiple Airlines
vie. 11/216:38 amONT - FRA
1 stop15h 37mMultiple Airlines
Deal found 6/10$594
This KLM deal was found by Cheapflights users on 6/12. 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.
sáb. 8/2310:40 amFRA - ONT
1 stop17h 31mKLM
dom. 9/77:05 amONT - FRA
1 stop16h 50mKLM
Deal found 6/12$596
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/161:15 pmFRA - ONT
2 stops18h 11mUnited Airlines
mar. 12/305:40 amONT - FRA
1 stop18h 40mUnited Airlines
Deal found 6/11$597
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/249:55 amFRA - ONT
2 stops20h 09mAir Canada
vie. 8/225:10 amONT - FRA
2 stops18h 00mAir Canada
Deal found 6/10$749
This Billigflug deal was found by Cheapflights users on 6/11. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/1810:40 amFRA - ONT
1 stop20h 45mAir France
mié. 7/212:07 pmONT - FRA
1 stop35h 48mAir France
Deal found 6/11$791

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 junio 12, 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

vie. 8/29

10:55 am-6:24 pm

1 stop16h 29m

Ontario

dom. 9/7

8:15 am-8:45 am

1 stop15h 30m

$583

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

mié. 6/25

10:55 am-9:33 pm

1 stop19h 38m

Ontario

vie. 8/22

6:10 am-7:20 am

2 stops16h 10m

$586

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

lun. 8/25

12:10 pm-10:48 pm

2 stops19h 38m

Ontario

dom. 9/7

8:15 am-8:45 am

1 stop15h 30m

$593

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

vie. 11/7

10:15 am-5:49 pm

1 stop16h 34m

Ontario

vie. 11/21

6:38 am-7:15 am

1 stop15h 37m

$594

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

sáb. 8/23

10:40 am-7:11 pm

1 stop17h 31m

Ontario

dom. 9/7

7:05 am-8:55 am

1 stop16h 50m

$596

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

lun. 10/6

9:15 am-5:40 pm

2 stops17h 25m

Ontario

dom. 10/12

9:36 am-9:10 am

1 stop14h 34m

$597

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

jue. 6/26

11:00 am-10:25 pm

2 stops20h 25m

Ontario

jue. 7/3

1:15 pm-1:35 pm

2 stops15h 20m

$696

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

mar. 6/24

9:55 am-9:04 pm

2 stops20h 09m

Ontario

vie. 8/22

5:10 am-8:10 am

2 stops18h 00m

$749

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

lun. 6/23

10:40 am-10:25 pm

1 stop20h 45m

Ontario

sáb. 6/28

11:49 am-8:55 am

1 stop36h 06m

$799

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

lun. 9/15

10:45 am-1:50 pm

1 stop36h 05m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 20 results
1
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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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 junio 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Air France from Frankfurt am Main to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Frankfurt am Main Airport to Ontario round-trip?

    Currently priced at $583, British Airways will fly you from Frankfurt am Main Airport to Ontario and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Iberia - these airlines can fly you to your destination from $586 and $593, respectively. British Airways is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Frankfurt am Main Airport to Ontario one-way?

    For one-way options, check prices for British Airways. According to our data, you can fly for as low as $675. Users have also found prices from $703 and $838 on Lufthansa and WestJet, respectively.

  • 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

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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$632Average$1,387FlexibilityNo cancel feeOn-time69%

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