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Ontario

$504+ Cheap flights from Madrid, Spain (MAD) 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
MAD — ONT
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Madrid to Ontario

Cheapest flights from Madrid to Ontario
Explore the most affordable flight options available from Madrid to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This United Airlines deal was found by Cheapflights users on 2/11. 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.
Thu 2/266:00 am
MAD
-
ONT
2 stops23h 50m
United Airlines
Mon 3/25:00 am
ONT
-
MAD
2 stops19h 15m
United Airlines
Deal found 2/11$734
This KLM deal was found by Cheapflights users on 2/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:00 am
MAD
-
ONT
2 stops24h 05m
KLM
Mon 3/210:20 pm
ONT
-
MAD
1 stop25h 55m
KLM
Deal found 2/11$744
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Wed 2/2511:15 am
MAD
-
ONT
2 stops19h 44m
United Airlines
Wed 3/45:00 am
ONT
-
MAD
2 stops19h 15m
United Airlines
Deal found 2/11$748
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Fri 2/278:35 am
MAD
-
ONT
2 stops23h 22m
United Airlines
Tue 3/35:00 am
ONT
-
MAD
2 stops19h 15m
United Airlines
Deal found 2/11$751
This Air Canada deal was found by Cheapflights users on 2/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:35 pm
MAD
-
ONT
2 stops32h 08m
Air Canada
Tue 3/105:15 am
ONT
-
MAD
2 stops17h 45m
Air Canada
Deal found 2/11$757
This British Airways deal was found by Cheapflights users on 2/11. 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 2/261:00 pm
MAD
-
ONT
1 stop17h 24m
British Airways
Tue 3/1710:56 am
ONT
-
MAD
1 stop13h 29m
British Airways
Deal found 2/11$760
This British Airways deal was found by Cheapflights users on 2/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:00 pm
MAD
-
ONT
1 stop17h 24m
British Airways
Tue 3/1710:56 am
ONT
-
MAD
1 stop13h 29m
British Airways
Deal found 2/12$761
This Iberia deal was found by Cheapflights users on 2/11. 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.
Fri 2/2712:40 pm
MAD
-
ONT
1 stop18h 49m
Iberia
Tue 3/36:00 am
ONT
-
MAD
1 stop15h 15m
Iberia
Deal found 2/11$766
This Iberia deal was found by Cheapflights users on 2/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:55 pm
MAD
-
ONT
1 stop16h 51m
Iberia
Thu 4/2310:59 am
ONT
-
MAD
1 stop18h 26m
Iberia
Deal found 2/10$769
This British Airways deal was found by Cheapflights users on 2/9. 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.
Thu 4/231:00 pm
MAD
-
ONT
1 stop18h 36m
British Airways
Sun 4/2611:59 pm
ONT
-
MAD
1 stop24h 06m
British Airways
Deal found 2/9$770
This Trip.com deal was found by Cheapflights users on 2/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:05 am
MAD
-
ONT
2 stops23h 00m
Multiple Airlines
Mon 3/26:00 am
ONT
-
MAD
2 stops24h 20m
Multiple Airlines
Deal found 2/10$771

Find flight deals from Madrid to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Madrid (MAD) 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 February 13, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$734
(United Airlines)

One-way from

$504
(Cheapflightsfares)

Popular in

July

Cheapest in

November

Average price

$665
Provider with most accurate pricing for Madrid Barajas-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Madrid Barajas-Ontario flights.
Search Deals
From Madrid Barajas to Ontario
Search Deals
One-way flight from Madrid Barajas to Ontario
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($235 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Madrid 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 February 13, 2026.
Use the filters below to find and compare flights from Madrid to Ontario that are best for you.

Fly from

Madrid

Fly to

Ontario

Route

Depart

Return

Price

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 2/26

6:00 am-9:05 pm

2 stops24h 05m

Ontario

Mon 3/2

10:20 pm-9:15 am

1 stop25h 55m

$744

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Fri 2/27

8:35 am-10:57 pm

2 stops23h 22m

Ontario

Tue 3/3

5:00 am-9:15 am

2 stops19h 15m

$751

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 2/26

1:00 pm-9:24 pm

1 stop17h 24m

Ontario

Tue 3/17

10:56 am-8:25 am

1 stop13h 29m

$760

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 2/26

1:00 pm-9:24 pm

1 stop17h 24m

Ontario

Wed 3/18

10:56 am-8:25 am

1 stop13h 29m

$760

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 3/5

1:00 pm-9:24 pm

1 stop17h 24m

Ontario

Wed 3/18

10:56 am-8:25 am

1 stop13h 29m

$761

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 3/3

12:40 pm-10:49 pm

1 stop19h 09m

Ontario

Tue 3/17

10:56 am-8:25 am

1 stop13h 29m

$761

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 3/3

12:40 pm-10:49 pm

1 stop19h 09m

Ontario

Wed 3/18

10:56 am-8:25 am

1 stop13h 29m

$761

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Wed 3/4

12:40 pm-10:49 pm

1 stop19h 09m

Ontario

Tue 3/17

10:56 am-8:25 am

1 stop13h 29m

$761

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Wed 3/4

12:40 pm-10:49 pm

1 stop19h 09m

Ontario

Wed 3/18

10:56 am-8:25 am

1 stop13h 29m

$762

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 5/12

1:00 pm-8:27 pm

1 stop16h 27m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 19 results
1
2
  • Most accurate provider: When it comes to deals on Madrid-Ontario flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Madrid-Ontario flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Madrid-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Madrid-Ontario flights, Cheapflights users trust Expedia the most. Expedia 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 Madrid-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 Madrid to Ontario

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

What is the cheapest month to book a flight from Madrid to Ontario?

Currently, November is the cheapest month in which you can book a flight from Madrid to Ontario (average of $450). Flying from Madrid to Ontario in July is currently the most expensive (average of $674). 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.

Related info for your journey

Find useful and relevant information for your journey from Madrid to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Madrid to Ontario?

    Departing from Madrid to Ontario will take you 17h 24m. The distance from Madrid to Ontario is about 5790 mi. 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 Madrid to Ontario that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Madrid 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 Madrid to Ontario?

    Currently, November is the cheapest month in which you can book a flight from Madrid to Ontario (average of $450). Flying from Madrid to Ontario in July is currently the most expensive (average of $674). 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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