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Ontario

$457+ Cheap flights from Madrid, Spain (MAD) 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
MAD — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$457
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$877
From Madrid Barajas to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($158 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 12, 2025.

This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:45 pmMAD - ONT
2 stops16h 58mUnited Airlines
Tue 9/167:00 amONT - MAD
2 stops17h 00mUnited Airlines
Deal found 6/10$457
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/24:00 pmMAD - ONT
1 stop15h 48mIberia
Mon 9/82:54 pmONT - MAD
1 stop14h 26mIberia
Deal found 6/12$470
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.
Thu 10/212:30 pmMAD - ONT
2 stops19h 00mMultiple Airlines
Wed 10/157:02 amONT - MAD
2 stops16h 18mMultiple Airlines
Deal found 6/10$482
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/104:00 pmMAD - ONT
1 stop15h 57mAmerican Airlines
Wed 7/2310:53 amONT - MAD
1 stop13h 12mAmerican Airlines
Deal found 6/11$640
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1012:10 pmMAD - ONT
2 stops18h 28mBritish Airways
Thu 7/248:15 amONT - MAD
1 stop15h 50mBritish Airways
Deal found 6/12$773
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:00 amMAD - ONT
1 stop17h 42mKLM
Fri 11/1410:59 pmONT - MAD
1 stop25h 01mKLM
Deal found 6/11$777
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:05 amMAD - ONT
1 stop21h 36mDelta
Tue 10/217:00 amONT - MAD
1 stop17h 35mDelta
Deal found 6/10$800
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/112:45 pmMAD - ONT
3 stops32h 47mAir Canada
Fri 7/116:28 pmONT - MAD
3 stops27h 12mAir Canada
Deal found 6/12$958

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 June 12, 2025.
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

Tue 9/9

12:45 pm-8:43 pm

2 stops16h 58m

Ontario

Tue 9/16

7:00 am-9:00 am

2 stops17h 00m

$457

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 9/2

4:00 pm-10:48 pm

1 stop15h 48m

Ontario

Mon 9/8

2:54 pm-2:20 pm

1 stop14h 26m

$470

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 10/2

12:30 pm-10:30 pm

2 stops19h 00m

Ontario

Wed 10/15

7:02 am-8:20 am

2 stops16h 18m

$482

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 7/10

4:00 pm-10:57 pm

1 stop15h 57m

Ontario

Wed 7/23

10:53 am-9:05 am

1 stop13h 12m

$640

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 7/10

12:10 pm-9:38 pm

2 stops18h 28m

Ontario

Thu 7/24

8:15 am-9:05 am

1 stop15h 50m

$773

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Wed 10/29

10:00 am-7:42 pm

1 stop17h 42m

Ontario

Fri 11/14

10:59 pm-9:00 am

1 stop25h 01m

$777

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Fri 10/3

10:05 am-10:41 pm

1 stop21h 36m

Ontario

Sun 10/19

7:00 am-9:35 am

1 stop17h 35m

$800

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 7/1

12:45 pm-12:32 pm

3 stops32h 47m

Ontario

Fri 7/11

6:28 pm-6:40 am

3 stops27h 12m

$958

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Sat 11/22

6:00 am-5:17 pm

2 stops20h 17m

$771

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Mon 9/8

10:05 am-7:11 pm

1 stop18h 06m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 17 results
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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, August is the cheapest month in which you can book a flight from Madrid to Ontario (average of $246). Flying from Madrid 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 June 12, 2025.
Get a feel of what it's like to fly with Delta, KLM and United Airlines from Madrid 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.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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 Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

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 Madrid to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Madrid to Ontario round-trip?

    Our cheapest airline available from Madrid to Ontario is United Airlines. Our recent data shows that you can find tickets from as low as $457 on this airline. Additional options worth looking into are Iberia and American Airlines, starting at $470 and $640 round-trip.

  • What are the cheapest airlines to fly from Madrid to Ontario one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $771. Users have also found prices from $775 and $794 on KLM and Iberia, respectively.

  • 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, August is the cheapest month in which you can book a flight from Madrid to Ontario (average of $246). Flying from Madrid 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.

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