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$348+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
Jun 13 — Jun 201
Sat 6/13
Sat 6/20
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 May 14, 2026.

This KLM deal was found by Cheapflights users on 5/11. 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.
Sun 10/1812:00 pm
ONT
-
MAD
1 stop15h 15m
KLM
Tue 12/811:55 am
MAD
-
ONT
1 stop19h 19m
KLM
Deal found 5/11$755
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Tue 9/296:32 pm
ONT
-
PMI
2 stops28h 58m
United Airlines
Fri 10/910:10 am
PMI
-
ONT
2 stops19h 42m
United Airlines
Deal found 5/11$756
This KLM deal was found by Cheapflights users on 5/13. 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.
Mon 10/1212:00 pm
ONT
-
MAD
1 stop15h 15m
KLM
Wed 10/219:50 am
MAD
-
ONT
1 stop17h 28m
KLM
Deal found 5/13$764
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:00 am
ONT
-
MAD
1 stop17h 55m
Delta
Wed 11/256:00 am
MAD
-
ONT
2 stops19h 12m
Delta
Deal found 5/12$766
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am
ONT
-
MAD
1 stop17h 55m
Delta
Tue 11/2410:00 am
MAD
-
ONT
2 stops21h 14m
Delta
Deal found 5/12$769
This Delta deal was found by Cheapflights users on 5/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:00 pm
ONT
-
MAD
2 stops18h 20m
Delta
Fri 11/276:00 am
MAD
-
ONT
2 stops19h 12m
Delta
Deal found 5/11$770
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:05 pm
ONT
-
MAD
2 stops29h 55m
Delta
Thu 11/266:00 am
MAD
-
ONT
2 stops19h 12m
Delta
Deal found 5/12$771
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2210:59 pm
ONT
-
MAD
1 stop25h 56m
Delta
Fri 11/276:00 am
MAD
-
ONT
2 stops19h 12m
Delta
Deal found 5/12$772
This Delta deal was found by Cheapflights users on 5/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:56 am
ONT
-
MAD
1 stop15h 19m
Delta
Wed 10/286:00 am
MAD
-
ONT
2 stops18h 12m
Delta
Deal found 5/11$773
This United Airlines deal was found by Cheapflights users on 5/11. 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 10/76:05 am
ONT
-
MAD
2 stops18h 45m
United Airlines
Fri 10/912:45 pm
MAD
-
ONT
2 stops40h 31m
United Airlines
Deal found 5/11$774
This Finnair deal was found by Cheapflights users on 5/9. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 am
ONT
-
MAD
1 stop23h 25m
Multiple Airlines
Tue 9/293:55 pm
MAD
-
ONT
1 stop16h 11m
Multiple Airlines
Deal found 5/9$775
This United Airlines deal was found by Cheapflights users on 5/9. 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 9/237:00 am
ONT
-
MAD
2 stops16h 05m
United Airlines
Wed 9/301:30 pm
MAD
-
ONT
2 stops39h 46m
United Airlines
Deal found 5/9$776

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 May 14, 2026.

Round-trip from

$755
(KLM)

One-way from

$348
(Cheapflightsfares)

Popular in

June

Cheapest in

September

Average price

$868
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 ($213 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 14, 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

Sun 10/18

12:00 pm-12:15 pm

1 stop15h 15m

Madrid Barajas

Tue 12/8

11:55 am-10:14 pm

1 stop19h 19m

$755

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 10/4

10:59 pm-3:35 pm

2 stops31h 36m

Madrid Barajas

Wed 10/14

10:25 am-4:12 pm

2 stops38h 47m

$770

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 9/22

10:59 pm-6:20 am

2 stops22h 21m

Madrid Barajas

Thu 10/1

12:45 pm-11:44 pm

2 stops43h 59m

$780

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/20

12:00 pm-12:15 pm

1 stop15h 15m

Madrid Barajas

Mon 12/7

11:55 am-10:14 pm

1 stop19h 19m

$805

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Mon 11/2

10:47 am-4:10 pm

2 stops20h 23m

Valencia

Wed 11/18

7:30 am-6:22 pm

2 stops19h 52m

$864

OntarioPalma de Mallorca

ONT - PMI

ONTPMI

Ontario

Fri 10/9

6:32 pm-6:15 am

2 stops26h 43m

Palma de Mallorca Son Sant Joan

Sat 10/17

1:10 pm-12:12 pm

2 stops32h 02m

$874

OntarioMálaga

ONT - AGP

ONTAGP

Ontario

Mon 8/31

10:29 am-7:50 pm

2 stops24h 21m

Malaga

Wed 9/9

1:25 pm-11:06 pm

2 stops18h 41m

$888

OntarioMálaga

ONT - AGP

ONTAGP

Ontario

Wed 9/9

10:25 am-4:50 pm

2 stops21h 25m

Malaga

Wed 9/23

5:35 pm-9:08 pm

2 stops36h 33m

$903

OntarioPalma de Mallorca

ONT - PMI

ONTPMI

Ontario

Sat 8/15

7:00 am-8:30 am

2 stops40h 30m

Palma de Mallorca Son Sant Joan

Sat 8/22

8:55 am-7:57 pm

2 stops44h 02m

$928

OntarioValencia

ONT - VLC

ONTVLC

Ontario

Wed 10/7

1:18 pm-10:35 pm

2 stops24h 17m

Valencia

Wed 10/21

12:55 pm-10:59 pm

2 stops19h 04m

$941

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

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, February is the cheapest month in which you can book a flight from Ontario to Spain (average of $439). Flying from Ontario to Spain in June is currently the most expensive (average of $990). 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 May 14, 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
9,711 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,711 reviews
United Airlines
7.4
Good
9,711 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.1
Good
11,664 reviews
United Airlines
7.4
Good
9,711 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
3,216 reviews
United Airlines
7.4
Good
9,711 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,979 reviews
United Airlines
7.4
Good
9,711 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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, Delta, and United Airlines fly from Ontario to Spain in about 15h 15m. The time it takes to get you to your destination can typically vary by up to 16h 21m. 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 - 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, February is the cheapest month in which you can book a flight from Ontario to Spain (average of $439). Flying from Ontario to Spain in June is currently the most expensive (average of $990). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 May 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$497Average$695FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$912FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$682Average$1,075FlexibilityNo cancel feeOn-time69%

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