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$337+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
Aug 11 — Aug 181
Tue 8/11
Tue 8/18
1 adult, Economy
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Cheap 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 July 12, 2026.

This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:00 am
ONT
-
MAD
2 stops19h 00m
United Airlines
Wed 10/1412:45 pm
MAD
-
ONT
2 stops43h 14m
United Airlines
Deal found 7/9$735
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am
ONT
-
MAD
2 stops16h 05m
United Airlines
Fri 10/91:30 pm
MAD
-
ONT
2 stops42h 19m
United Airlines
Deal found 7/9$739
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:00 am
ONT
-
MAD
2 stops16h 50m
United Airlines
Fri 10/2312:45 pm
MAD
-
ONT
3 stops41h 13m
United Airlines
Deal found 7/9$746
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:56 pm
ONT
-
MAD
2 stops34h 04m
United Airlines
Fri 10/91:30 pm
MAD
-
ONT
2 stops42h 19m
United Airlines
Deal found 7/9$752
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/221:56 pm
ONT
-
MAD
2 stops33h 09m
United Airlines
Tue 10/65:55 am
MAD
-
ONT
3 stops23h 36m
United Airlines
Deal found 7/9$755
This oojo deal was found by Cheapflights users on 7/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:59 pm
ONT
-
MAD
1 stop22h 46m
British Airways
Tue 11/1711:05 am
MAD
-
ONT
1 stop20h 18m
British Airways
Deal found 7/10$760
This British Airways deal was found by Cheapflights users on 7/9. 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.
Tue 9/2210:25 am
ONT
-
MAD
1 stop13h 40m
British Airways
Tue 10/612:40 pm
MAD
-
ONT
1 stop16h 14m
British Airways
Deal found 7/9$763
This lastminute.com deal was found by Cheapflights users on 7/8. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:00 am
ONT
-
MAD
2 stops19h 15m
Iberia
Fri 10/233:55 pm
MAD
-
ONT
1 stop16h 57m
Iberia
Deal found 7/8$764
This Priceline deal was found by Cheapflights users on 7/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:37 pm
ONT
-
MAD
1 stop16h 48m
Iberia
Wed 10/147:30 am
MAD
-
ONT
2 stops22h 41m
Iberia
Deal found 7/9$767
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1912:17 pm
ONT
-
MAD
2 stops33h 03m
Delta
Fri 10/99:50 am
MAD
-
ONT
1 stop17h 23m
Delta
Deal found 7/9$768
This Delta deal was found by Cheapflights users on 7/8. 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 11/177:00 am
ONT
-
VLC
2 stops19h 55m
Delta
Thu 12/36:00 am
VLC
-
ONT
2 stops19h 12m
Delta
Deal found 7/8$778
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:00 pm
ONT
-
MAD
2 stops50h 55m
Delta
Thu 10/89:50 am
MAD
-
ONT
1 stop21h 11m
Delta
Deal found 7/9$779

Find flight deals from Ontario to Spain

Keep the following information in mind while searching for Ontario to Spain flight deals. Data was last updated July 12, 2026.

Round-trip from

$735
(United Airlines)

One-way from

$337
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,070
From Ontario to Spain
Search Deals
One-way flight from Ontario to Spain
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($199 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 12, 2026.
Use the filters below to find and compare flights from Ontario to Spain that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/20

5:00 am-6:50 am

2 stops16h 50m

Madrid Barajas

Fri 10/23

12:45 pm-8:58 pm

3 stops41h 13m

$746

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Mon 11/9

6:46 am-12:50 pm

2 stops21h 04m

Bilbao

Thu 11/12

6:45 am-8:06 pm

2 stops22h 21m

$780

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Sun 11/15

9:00 am-5:30 pm

2 stops23h 30m

Valencia

Thu 12/3

1:00 pm-11:06 pm

2 stops19h 06m

$792

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Wed 11/18

9:00 am-5:30 pm

2 stops23h 30m

Valencia

Fri 11/27

6:10 am-8:06 pm

2 stops22h 56m

$792

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Wed 11/18

9:00 am-5:30 pm

2 stops23h 30m

Valencia

Thu 12/3

1:00 pm-11:06 pm

2 stops19h 06m

$792

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Mon 11/23

1:13 pm-11:20 pm

2 stops49h 07m

Valencia

Thu 11/26

1:00 pm-8:06 pm

2 stops40h 06m

$802

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/18

1:52 pm-2:20 pm

1 stop15h 28m

Barcelona-El Prat

Thu 10/22

12:15 pm-10:49 pm

2 stops43h 34m

$853

OntarioPalma de Mallorca

ONT - PMI

ONTPMI

Ontario

Mon 8/17

7:00 am-7:15 pm

2 stops27h 15m

Palma de Mallorca Son Sant Joan

Wed 9/2

7:45 am-10:37 pm

2 stops23h 52m

$885

OntarioMálaga

ONT - AGP

ONTAGP

Ontario

Fri 8/14

5:05 pm-8:15 pm

2 stops18h 10m

Malaga

Fri 8/28

10:45 am-10:45 pm

2 stops21h 00m

$933

OntarioSantiago de Compostela

ONT - SCQ

ONTSCQ

Ontario

Sun 8/16

2:27 pm-9:05 pm

2 stops21h 38m

Santiago de Compostela

Tue 9/1

1:45 pm-10:59 pm

2 stops18h 14m

$946

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/12

Showing 1-10 of 60 resultsSorted by cheapest first
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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, August is the cheapest month in which you can book a flight from Ontario to Spain (average of $340). Flying from Ontario to Spain in July is currently the most expensive (average of $1,373). 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.

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 July 12, 2026.
Read through reviews of airlines operating flights from Ontario to Spain, such as United Airlines,American Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,981 reviews

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,981 reviews
United Airlines
7.4
Good
9,981 reviews

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,806 reviews
United Airlines
7.4
Good
9,981 reviews

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Iberia
7.0
Good
3,252 reviews
United Airlines
7.4
Good
9,981 reviews

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
British Airways
6.7
Okay
8,104 reviews
United Airlines
7.4
Good
9,981 reviews

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 United Airlines, KLM, and Delta fly from Ontario to Spain in about 16h 50m. The time it takes to get you to your destination can typically vary by up to 16h 13m. 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 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 - Barcelona-El Prat or Ontario - Madrid Barajas 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, August is the cheapest month in which you can book a flight from Ontario to Spain (average of $340). Flying from Ontario to Spain in July is currently the most expensive (average of $1,373). 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 3 airlines flying from Ontario to Spain

Discover the top 3 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 July 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$504Average$866FlexibilityNo cancel feeOn-time70%
IberiaCheapest$511Average$687FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$714Average$1,111FlexibilityNo cancel feeOn-time69%

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