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$352+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

This Delta deal was found by Cheapflights users on 10/28. 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 10/287:05 amONT - MAD
1 stop17h 00mDelta
Wed 11/1211:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 10/28$438
This Delta deal was found by Cheapflights users on 10/28. 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 10/287:05 amONT - MAD
1 stop17h 00mDelta
Thu 11/66:00 amMAD - ONT
2 stops18h 53mDelta
Deal found 10/28$462
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/85:05 amONT - MAD
2 stops19h 10mUnited Airlines
Wed 12/248:30 amMAD - ONT
2 stops37h 08mUnited Airlines
Deal found 10/29$479
This Delta deal was found by Cheapflights users on 10/28. 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 11/287:05 amONT - MAD
1 stop15h 55mDelta
Fri 12/1211:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 10/28$480
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 12/812:46 pmONT - MAD
1 stop32h 29mAmerican Airlines
Wed 12/2412:40 pmMAD - ONT
1 stop29h 58mAmerican Airlines
Deal found 10/29$481
This United Airlines deal was found by Cheapflights users on 10/27. 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
Tue 12/96:00 amMAD - ONT
2 stops23h 42mUnited Airlines
Deal found 10/27$487
This Delta deal was found by Cheapflights users on 10/30. 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 11/177:05 amONT - MAD
1 stop17h 10mDelta
Mon 11/2411:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 10/30$488
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/47:00 amONT - MAD
2 stops16h 05mUnited Airlines
Tue 11/116:00 amMAD - ONT
2 stops25h 51mUnited Airlines
Deal found 10/29$492
This United Airlines deal was found by Cheapflights users on 10/28. 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 10/287:00 amONT - MAD
2 stops18h 15mUnited Airlines
Fri 11/711:05 amMAD - ONT
2 stops20h 46mUnited Airlines
Deal found 10/28$493
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/197:00 amONT - MAD
2 stops24h 40mUnited Airlines
Thu 11/276:00 amMAD - ONT
2 stops39h 37mUnited Airlines
Deal found 10/29$496
This Delta deal was found by Cheapflights users on 10/30. 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.
Thu 10/306:00 amONT - MAD
2 stops21h 30mDelta
Thu 11/611:15 amMAD - ONT
1 stop20h 07mDelta
Deal found 10/30$507
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/35:05 amONT - PMI
2 stops25h 20mUnited Airlines
Sun 12/74:15 pmPMI - ONT
3 stops39h 34mUnited Airlines
Deal found 10/29$515

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 October 30, 2025.

Round-trip from

$479
(United Airlines)

One-way from

$330
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$618
From Ontario to Spain
Search Deals
One-way flight from Ontario to Spain
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($212 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 30, 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

Mon 12/8

5:05 am-9:15 am

2 stops19h 10m

Madrid Barajas

Wed 12/24

8:30 am-12:38 pm

2 stops37h 08m

$479

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Fri 11/28

7:05 am-8:00 am

1 stop15h 55m

Madrid Barajas

Fri 12/12

11:15 am-7:39 pm

1 stop17h 24m

$480

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

5:05 am-8:00 am

2 stops17h 55m

Madrid Barajas

Tue 12/9

6:00 am-8:42 pm

2 stops23h 42m

$487

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 11/18

6:00 am-8:00 am

2 stops17h 00m

Madrid Barajas

Wed 11/26

11:05 am-10:51 pm

2 stops20h 46m

$488

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 12/1

7:00 am-9:15 am

2 stops17h 15m

Madrid Barajas

Thu 12/11

6:00 am-8:42 pm

2 stops23h 42m

$492

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 1/14

6:00 am-9:15 am

2 stops18h 15m

Madrid Barajas

Wed 1/21

11:15 am-10:53 pm

2 stops20h 38m

$493

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 12/8

10:25 pm-8:00 am

2 stops24h 35m

Madrid Barajas

Wed 12/24

11:15 am-10:00 am

1 stop31h 45m

$514

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Fri 11/28

6:00 am-8:00 am

2 stops17h 00m

Madrid Barajas

Fri 12/5

1:35 pm-10:49 pm

3 stops42h 14m

$515

OntarioPalma de Mallorca

ONT - PMI

ONTPMI

Ontario

Wed 12/3

5:05 am-3:25 pm

2 stops25h 20m

Palma de Mallorca Son Sant Joan

Sun 12/7

4:15 pm-10:49 pm

3 stops39h 34m

$515

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Thu 11/27

7:00 am-9:15 am

2 stops17h 15m

Madrid Barajas

Thu 12/4

6:00 am-8:42 pm

2 stops23h 42m

$542

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, October is the cheapest month in which you can book a flight from Ontario to Spain (average of $347). 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 October 30, 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 October 30, 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
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
8,996 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
11,034 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
3,004 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
7,488 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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 United Airlines, KLM, and British Airways fly from Ontario to Spain in about 15h 55m. The time it takes to get you to your destination can typically vary by up to 3h 15m. 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?

    $399 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on British Airways and KLM, with prices starting from $453 and $477, 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, October is the cheapest month in which you can book a flight from Ontario to Spain (average of $347). 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 October 30, 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$834FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$595Average$1,172FlexibilityNo cancel feeOn-time71%

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