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$300+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 November 17, 2025.

This Delta deal was found by Cheapflights users on 11/15. 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.
Tue 12/27:05 amONT - MAD
1 stop17h 10mDelta
Fri 12/1211:15 amMAD - ONT
1 stop17h 24mDelta
Deal found 11/15$438
This Delta deal was found by Cheapflights users on 11/15. 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 12/110:25 pmONT - MAD
1 stop25h 50mDelta
Wed 12/1011:15 amMAD - ONT
1 stop17h 24mDelta
Deal found 11/15$443
This oojo deal was found by Cheapflights users on 11/16. 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.
Mon 12/112:49 pmONT - MAD
1 stop35h 36mBritish Airways
Fri 12/1212:40 pmMAD - ONT
1 stop34h 15mBritish Airways
Deal found 11/16$449
This Delta deal was found by Cheapflights users on 11/15. 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.
Tue 12/27:05 amONT - MAD
1 stop17h 10mDelta
Tue 12/96:00 amMAD - ONT
2 stops20h 07mDelta
Deal found 11/15$462
This Delta deal was found by Cheapflights users on 11/15. 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 12/110:25 pmONT - MAD
1 stop25h 50mDelta
Tue 12/96:00 amMAD - ONT
2 stops20h 07mDelta
Deal found 11/15$468
This American Airlines deal was found by Cheapflights users on 11/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:59 pmONT - MAD
1 stop33h 26mAmerican Airlines
Thu 1/221:00 pmMAD - ONT
1 stop30h 08mAmerican Airlines
Deal found 11/17$479
This British Airways deal was found by Cheapflights users on 11/17. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:47 amONT - MAD
2 stops18h 28mBritish Airways
Thu 1/221:00 pmMAD - ONT
1 stop18h 48mBritish Airways
Deal found 11/17$484
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:05 amONT - MAD
2 stops17h 55mUnited Airlines
Thu 12/116:00 amMAD - ONT
2 stops23h 42mUnited Airlines
Deal found 11/17$487
This KLM deal was found by Cheapflights users on 11/15. 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 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 24mKLM
Deal found 11/15$488
This oojo deal was found by Cheapflights users on 11/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:00 amONT - MAD
1 stop17h 25mBritish Airways
Thu 12/1112:40 pmMAD - ONT
1 stop20h 15mBritish Airways
Deal found 11/17$490
This American Airlines deal was found by Cheapflights users on 11/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1610:34 pmONT - MAD
1 stop22h 11mAmerican Airlines
Sun 11/231:15 pmMAD - ONT
2 stops17h 44mAmerican Airlines
Deal found 11/15$493
This oojo deal was found by Cheapflights users on 11/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2911:59 pmONT - MAD
1 stop24h 26mBritish Airways
Wed 12/1012:40 pmMAD - ONT
1 stop18h 48mBritish Airways
Deal found 11/17$496

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 November 17, 2025.

Round-trip from

$426
(Expedia)

One-way from

$300
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$697
From Ontario to Spain
Search Deals
One-way flight from Ontario to Spain
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($199 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 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

Sun 2/15

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Tue 2/24

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 3/2

11:59 pm-9:25 am

1 stop24h 26m

Madrid Barajas

Mon 3/9

8:50 pm-9:40 pm

2 stops32h 50m

$469

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 3/3

5:00 am-8:00 am

2 stops18h 00m

Madrid Barajas

Tue 3/10

9:05 am-10:57 pm

2 stops21h 52m

$487

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 2/11

5:05 am-8:00 am

2 stops17h 55m

Madrid Barajas

Wed 2/25

5:55 am-8:50 pm

2 stops23h 55m

$487

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 1/7

1:24 pm-9:55 pm

2 stops47h 31m

Bilbao

Tue 1/13

11:35 am-5:43 pm

2 stops39h 08m

$488

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 1/14

6:10 am-9:15 am

2 stops18h 05m

Madrid Barajas

Wed 1/28

8:30 am-10:53 pm

2 stops23h 23m

$492

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 12/10

6:00 am-9:15 am

2 stops18h 15m

Madrid Barajas

Tue 12/16

11:15 am-10:49 pm

2 stops20h 34m

$493

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

6:00 am-9:15 am

2 stops18h 15m

Madrid Barajas

Wed 12/10

11:05 am-8:42 pm

2 stops18h 37m

$493

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Sat 1/17

6:00 am-5:30 pm

2 stops26h 30m

Valencia

Sat 1/24

1:10 pm-10:53 pm

2 stops18h 43m

$497

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Sat 1/17

6:00 am-5:30 pm

2 stops26h 30m

Valencia

Sun 1/25

1:10 pm-10:53 pm

2 stops18h 43m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

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 $343). Flying from Ontario to Spain in June is currently the most expensive (average of $610). 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 November 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 19% on flights from Ontario to Spain by exploring options for tickets in the afternoon.

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 November 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
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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
7.9
Good
8,006 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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
9,014 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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
11,046 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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
3,018 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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
7,528 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

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 KLM, British Airways, and United Airlines fly from Ontario to Spain in about 18h. The time it takes to get you to your destination can typically vary by up to 7h 55m. 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?

    $310 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on British Airways and Delta, with prices starting from $316 and $336, respectively.

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

    When deciding which route to take from Ontario to Spain consider Ontario - Palma de Mallorca Son Sant Joan, Ontario - Madrid Barajas or Ontario - Barcelona-El Prat 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 $343). Flying from Ontario to Spain in June is currently the most expensive (average of $610). 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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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$801FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$489Average$899FlexibilityNo cancel feeOn-time70%
IberiaCheapest$489Average$926FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$523Average$845FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$595Average$1,173FlexibilityNo cancel feeOn-time71%

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