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$322+ Cheap flights from Ontario (ONT) to Spain

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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Ontario to Spain

Keep the following information in mind while searching for Ontario to Spain flight deals. Data was last updated September 17, 2025.

Round-trip from

$438
(Delta)

One-way from

$322
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$632
From Ontario to Spain
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One-way flight from Ontario to Spain
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Highest demand for flights based on searches. 22% potential increase in price ($214 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Spain

Cheapest flights from Ontario to Spain
Explore the most affordable flight options available from Ontario to Spain. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 10/277:05 amONT - MAD
1 stop17h 00mDelta
Fri 11/711:15 amMAD - ONT
1 stop20h 07mDelta
Deal found 9/15$438
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 12/27:05 amONT - MAD
1 stop17h 10mDelta
Thu 1/2210:00 amMAD - ONT
2 stops20h 14mDelta
Deal found 9/16$443
This Delta deal was found by Cheapflights users on 9/16. 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.
Mon 12/110:25 pmONT - MAD
1 stop25h 50mDelta
Wed 1/2110:00 amMAD - ONT
2 stops20h 14mDelta
Deal found 9/16$448
This Delta deal was found by Cheapflights users on 9/17. 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.
Tue 10/77:35 amONT - MAD
2 stops18h 45mDelta
Thu 11/2011:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 9/17$457
This Delta deal was found by Cheapflights users on 9/17. 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.
Wed 10/16:00 amONT - MAD
2 stops24h 35mDelta
Wed 10/1512:40 pmMAD - ONT
2 stops31h 28mDelta
Deal found 9/17$462
This Delta deal was found by Cheapflights users on 9/16. 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.
Sat 10/45:40 pmONT - MAD
2 stops29h 10mDelta
Wed 10/156:00 amMAD - ONT
2 stops20h 10mDelta
Deal found 9/16$467
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/217:35 amONT - MAD
2 stops24h 10mDelta
Tue 10/2811:00 amMAD - ONT
2 stops31h 26mDelta
Deal found 9/16$483
This KLM deal was found by Cheapflights users on 9/17. 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.
Fri 11/287:05 amONT - MAD
1 stop15h 55mKLM
Thu 12/1111:15 amMAD - ONT
1 stop17h 20mKLM
Deal found 9/17$488
This Delta deal was found by Cheapflights users on 9/15. 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.
Sun 10/267:05 amONT - MAD
1 stop17h 00mDelta
Tue 11/411:15 amMAD - ONT
1 stop17h 04mDelta
Deal found 9/15$493
This oojo deal was found by Cheapflights users on 9/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:04 pmONT - MAD
1 stop33h 21mBritish Airways
Wed 1/211:00 pmMAD - ONT
1 stop18h 02mBritish Airways
Deal found 9/16$494
This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 11/1710:25 pmONT - MAD
1 stop25h 50mDelta
Wed 11/2611:15 amMAD - ONT
1 stop17h 22mDelta
Deal found 9/15$498
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/236:04 amONT - BIO
2 stops19h 41mUnited Airlines
Tue 10/286:45 amBIO - ONT
2 stops18h 49mUnited Airlines
Deal found 9/16$504

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Spain 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 17, 2025.
Use the filters below to find and compare flights from Ontario to Spain that are best for you.

Fly from

Ontario

Fly to

Spain

Route

Depart

Return

Price

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/28

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 10/27

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 10/27

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-10:22 pm

1 stop20h 07m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 10/26

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 2/4

6:00 am-8:00 am

2 stops17h 00m

Madrid Barajas

Wed 2/18

10:00 am-9:14 pm

2 stops20h 14m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 2/15

10:30 pm-9:00 am

1 stop25h 30m

Madrid Barajas

Thu 2/26

11:00 am-9:14 pm

1 stop19h 14m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/17

10:30 pm-9:00 am

1 stop25h 30m

Madrid Barajas

Tue 2/24

11:00 am-9:14 pm

1 stop19h 14m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

7:05 am-9:15 am

1 stop17h 10m

Madrid Barajas

Fri 1/23

10:00 am-9:14 pm

2 stops20h 14m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

7:05 am-9:15 am

1 stop17h 10m

Madrid Barajas

Thu 1/22

10:00 am-9:14 pm

2 stops20h 14m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

7:05 am-9:15 am

1 stop17h 10m

Madrid Barajas

Wed 1/21

10:00 am-9:14 pm

2 stops20h 14m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Spain

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

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Spain (average of $543). Flying from Ontario to Spain in June is currently the most expensive (average of $1,054). 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.

What is the cheapest time of day to fly from ONT to ES?

Find hourly flight availability from Ontario to Spain. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Spain as you normally would.

Reviews of airlines servicing Spain

Get insights into the airlines that provide service to Spain. 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 Spain. Reviews last updated September 17, 2025.
Read through reviews of airlines operating flights from Ontario to Spain, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,925 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
7,367 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Spain. 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 from for flights from Ontario to Spain?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Spain. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Spain?

    Airlines like Delta, KLM, and United Airlines fly from Ontario to Spain in about 17h. The time it takes to get you to your destination can typically vary by up to 5h 10m. Airlines will cover a distance of 5790 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $379 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Iberia and United Airlines, with prices starting from $407 and $448, respectively.

  • What are the most popular routes from Ontario to Spain?

    When deciding which route to take from Ontario to Spain consider Ontario - Madrid Barajas, Ontario - Barcelona-El Prat or Ontario - Palma de Mallorca Son Sant Joan as they are the most popular.

  • Can I find deals for flights from Ontario to Spain that include hotel bookings?

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to Spain (average of $543). Flying from Ontario to Spain in June is currently the most expensive (average of $1,054). 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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Alternative routes for Ontario to Spain

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Top 5 airlines flying from Ontario to Spain

Discover the top 5 airlines that operate flights from Ontario to Spain. 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$801FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$489Average$887FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$492Average$815FlexibilityNo cancel feeOn-time69%
IberiaCheapest$496Average$920FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$595Average$1,068FlexibilityNo cancel feeOn-time71%

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