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Cheap flights from Madrid to Ontario from $422

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Madrid to Ontario departing on 4/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Madrid to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:05 am - 9:56 am
MAD
-
ONT
36h 51m
2 stops
United Airlines Logo
6:05 am - 9:00 am
ONT
-
MAD
17h 55m
2 stops
$742United Airlines
Thu, Apr 23 - Sun, Apr 26
Delta Logo
2:35 pm - 1:39 pm
MAD
-
ONT
32h 04m
2 stops
Delta Logo
7:00 am - 11:20 am
ONT
-
MAD
19h 20m
2 stops
$753Delta
Thu, Apr 23 - Thu, Apr 30
American Airlines Logo
3:55 pm - 10:09 am
MAD
-
ONT
27h 14m
1 stop
American Airlines Logo
7:30 am - 2:25 pm
ONT
-
MAD
21h 55m
1 stop
$755American Airlines
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
1:00 pm - 10:36 pm
MAD
-
ONT
18h 36m
1 stop
British Airways Logo
10:59 am - 9:05 am
ONT
-
MAD
13h 06m
1 stop
$756British Airways
Mon, Apr 20 - Thu, Apr 30
KLM Logo
12:45 pm - 9:00 pm
MAD
-
ONT
17h 15m
1 stop
KLM Logo
12:49 pm - 12:15 pm
ONT
-
MAD
14h 26m
1 stop
$757KLM
Mon, Apr 20 - Sun, Apr 26
Iberia Logo
3:55 pm - 11:46 pm
MAD
-
ONT
16h 51m
1 stop
Iberia Logo
7:30 am - 9:05 am
ONT
-
MAD
16h 35m
1 stop
$764Iberia
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
10:25 am - 9:07 pm
MAD
-
ONT
19h 42m
1 stop
British Airways Logo
11:59 pm - 9:05 am
ONT
-
MAD
24h 06m
1 stop
$772British Airways
Fri, May 1 - Tue, May 5
British Airways Logo
1:00 pm - 10:36 pm
MAD
-
ONT
18h 36m
1 stop
British Airways Logo
10:59 am - 9:05 am
ONT
-
MAD
13h 06m
1 stop
$773British Airways
Fri, Apr 24 - Wed, Apr 29
KLM Logo
12:45 pm - 9:00 pm
MAD
-
ONT
17h 15m
1 stop
KLM Logo
12:49 pm - 12:15 pm
ONT
-
MAD
14h 26m
1 stop
$776KLM
Fri, Apr 17 - Sat, Apr 25
United Airlines Logo
5:55 am - 8:36 pm
MAD
-
ONT
23h 41m
2 stops
United Airlines Logo
7:00 am - 8:05 am
ONT
-
MAD
16h 05m
2 stops
$777United Airlines
Tue, Apr 21 - Sun, May 3

Delta flights from Madrid to Ontario

Our best Delta deals on Madrid to Ontario flight tickets
Delta
Apr 23
MAD2:35 pmMadrid Barajas
32h 04m
2 stops
ONT1:39 pmOntario
Apr 30
ONT7:00 amOntario
19h 20m
2 stops
MAD11:20 amMadrid Barajas
$753
Delta
Apr 20
MAD12:45 pmMadrid Barajas
17h 15m
1 stop
ONT9:00 pmOntario
May 4
ONT12:49 pmOntario
14h 26m
1 stop
MAD12:15 pmMadrid Barajas
$846
Delta
Mar 17
MAD10:05 amMadrid Barajas
18h 55m
1 stop
ONT9:00 pmOntario
Apr 6
ONT10:25 pmOntario
28h 50m
1 stop
MAD12:15 pmMadrid Barajas
$948

American Airlines flights from Madrid to Ontario

Our best American Airlines deals on Madrid to Ontario flight tickets
American Airlines
Apr 13
MAD3:55 pmMadrid Barajas
27h 14m
1 stop
ONT10:09 amOntario
Apr 27
ONT7:30 amOntario
21h 55m
1 stop
MAD2:25 pmMadrid Barajas
$755
American Airlines
Mar 16
MAD11:25 amMadrid Barajas
19h 05m
1 stop
ONT10:30 pmOntario
Apr 7
ONT2:08 pmOntario
15h 17m
1 stop
MAD2:25 pmMadrid Barajas
$912

momondo Fare Finder

 
Customize your flight search to find flights from Madrid to Ontario 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, momondo users made 832,500 searches. Data last updated March 10, 2026.
Use the filters below to find and compare flights from Madrid to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 4/23

6:05 am-9:56 am

2 stops36h 51m

Ontario

Sun 4/26

6:05 am-9:00 am

2 stops17h 55m

$742

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Thu 4/23

2:35 pm-1:39 pm

2 stops32h 04m

Ontario

Thu 4/30

7:00 am-11:20 am

2 stops19h 20m

$753

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Mon 4/13

3:55 pm-10:09 am

1 stop27h 14m

Ontario

Mon 4/27

7:30 am-2:25 pm

1 stop21h 55m

$755

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Mon 4/20

1:00 pm-10:36 pm

1 stop18h 36m

Ontario

Thu 4/30

10:59 am-9:05 am

1 stop13h 06m

$756
Quickest round-trip

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Mon 4/20

12:45 pm-9:00 pm

1 stop17h 15m

Ontario

Sun 4/26

12:49 pm-12:15 pm

1 stop14h 26m

$757

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Mon 4/13

3:55 pm-11:46 pm

1 stop16h 51m

Ontario

Mon 4/27

7:30 am-9:05 am

1 stop16h 35m

$764

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Fri 5/1

10:25 am-9:07 pm

1 stop19h 42m

Ontario

Tue 5/5

11:59 pm-9:05 am

1 stop24h 06m

$772

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Fri 4/24

1:00 pm-10:36 pm

1 stop18h 36m

Ontario

Wed 4/29

10:59 am-9:05 am

1 stop13h 06m

$773

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Fri 4/17

12:45 pm-9:00 pm

1 stop17h 15m

Ontario

Sat 4/25

12:49 pm-12:15 pm

1 stop14h 26m

$776

MadridOntario

MAD - ONT

MADONT

Madrid Barajas

Tue 4/21

5:55 am-8:36 pm

2 stops23h 41m

Ontario

Sun 5/3

7:00 am-8:05 am

2 stops16h 05m

$777

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Madrid to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Madrid to Ontario flights?

You could potentially save up to 43% on your flight if you consider stops on a Madrid to Ontario flight.

When to book flights from Madrid to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Madrid to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Madrid to Ontario (MAD to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Madrid to Ontario

Fastest flight time

15h 55m

Direct flights

None
The fastest flight from Madrid to Ontario takes 15h 55m
There are no direct flights from Madrid to Ontario. There are no popular flight routes from Madrid to Ontario.
Search flight deals

  • How far is Madrid Barajas to Ontario by plane?

    Madrid Barajas and Ontario are 5789.5 mi apart from one another. By plane, this route typically takes 15h 55m.

  • When did momondo last update prices for flights from Madrid Barajas Airport to Ontario Airport?

    Prices for flights from Madrid Barajas Airport to Ontario Airport refresh daily.

  • How old do you have to be to fly from Madrid Barajas Airport to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Madrid Barajas Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Madrid to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Madrid.

Can I find flights from Madrid to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from Madrid with this policy.

How can momondo help me find flights from Madrid to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from Madrid. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Madrid to Ontario right now. Can momondo alert me if prices change?

Price alerts on flights to Ontario from Madrid are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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