Cheap flights from Ontario to Madrid from $435 ONT → MAD
Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD)
The cheapest return found recently is $1,434 with Iberia, 14 Jun 2027 – 17 Jun 2027, found 3 days ago. The cheapest one-way found recently is $435 with British Airways, 18 Mar 2027, found 2 days ago.
- Cheapest one-way found recently
- $435, found 2 days ago
- Cheapest return found recently
- $1,434, 14 Jun 2027 to 17 Jun 2027
- Usual return price
- $1,018 to $1,518
- Cheapest month to fly
- November 2026, return fares from $983 found in the last 7 days
Return
The cheapest return fare on each of 4 departure dates is usually $1,018 to $1,518.
Cheapest return found recently
$1,434
14 Jun 2027 – 17 Jun 2027 · Iberia
Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD)
Leaves 10:22 a.m. · Return leaves 10:25 p.m. · 39 h 3 min of travel, both ways together
out 1 stop, back 1 stop · via Dallas/Fort Worth International Airport (DFW), Lisbon Portela Airport (LIS) · overnight connection · 11 h connection
found 3 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,434 14 Jun 2027 – 17 Jun 2027found 3 days agoSee prices for these dates
$983 24 Nov – 3 Decfound 6 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $661 to $1,005.
At $1,434, the cheapest return found recently is above that range.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 24 Nov to 14 Jun 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 3-night return fares leaving within 3 days of 14 Jun 2027 to compare.
Every date we hold
35 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Nov – 3 Dec | $983 | United Airlines | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | out 2 stops, back 1 stop | found 6 days ago | See prices for these dates |
| 27 Nov – 3 Dec | $1,030 | Iberia | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 16 Dec – 27 Dec | $1,768 | British Airways | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 14 Jun 2027 – 17 Jun 2027 | $1,434 | Iberia | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $983.
Airlines on the cheapest dates: Iberia, United Airlines, British Airways.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $410 to $501.
Cheapest one-way found recently
$435
18 Mar 2027 · British Airways
Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD)
Leaves 7:00 a.m. · 15 h 10 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$435 18 Mar 2027found 2 days agoOpen this trip
$384 13 Jan 2027found 7 days agoOpen this trip
What have prices looked like?
Over 31 days, 5 Oct to 11 Nov, the cheapest one-way we saw each day was $384 to $808.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 13 Jan 2027 to 17 May 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 18 Mar 2027 to compare.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 13 Jan 2027 | $384 | American Airlines | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | stops unknown | found 7 days ago | Open this trip |
| 18 Mar 2027 | $435 | British Airways | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | 1 stop | found 2 days ago | Open this trip |
| 17 May 2027 | $567 | United Airlines | Ontario International Airport (ONT) → Adolfo Suarez Madrid-Barajas Airport (MAD) | 2 stops | found 6 days ago | Open this trip |
Which month looks cheapest?
January 2027 is the cheapest month — from $384.
Airlines on the cheapest dates: American Airlines, British Airways, United Airlines.
Premium cabin fares from Ontario to Madrid
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 14 Jun 2027 – 17 Jun 2027 in another cabin: Premium economy · Business · First
Today's prices for 18 Mar 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Madrid?
Return
Fares 90 to 179 days before departure were typically 12% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $990 | $817 | +14% | 23 |
| 7–13 days | $897 | $834 | +3% | 24 |
| 14–29 days | $1,005 | $758 | +15% | 34 |
| 30–59 days | $879 | $661 | +1% | 37 |
| 60–89 days | $1,378 | $718 | +58% | 18 |
| 90–179 days | $872 | $728 | Cheapest seen | 29 |
| 180+ days | $1,346 | $872 | +54% | 41 |
One-way
Not enough history yet: in 31 days of one-way prices, 5 Oct to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Madrid
56 km from Ontario
$1,075
$359 less than flying from Ontario
14 Jun 2027 – 18 Jun 2027 · LAX → MAD · out 3 stops, back 1 stop
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Madrid
56 km from Ontario
$387
$48 less than flying from Ontario
18 Mar 2027 · LAX → MAD · 1 stop
found 2 days ago
Long Beach → Madrid
60 km from Ontario
$763
$328 more than flying from Ontario
13 Jan 2027 · LGB → MAD · 2 stops
found 7 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 14 Jun 2027 – 17 Jun 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Ontario to Madrid?
The cheapest return found recently is $1,434 with Iberia, 14 Jun 2027 to 17 Jun 2027, found 3 days ago. The cheapest return we hold, of any age, is $983 with United Airlines, 24 Nov to 3 Dec, found 6 days ago. The cheapest return fare on each of 4 departure dates is usually $1,018 to $1,518.
How much is a one-way flight from Ontario to Madrid?
The cheapest one-way found recently is $435 with British Airways, 18 Mar 2027, found 2 days ago. The cheapest one-way we hold, of any age, is $384 with American Airlines, 13 Jan 2027, found 7 days ago. The cheapest one-way fare on each of 3 departure dates is usually $410 to $501.
What is the cheapest month to fly from Ontario to Madrid?
November 2026 is the cheapest month for a return, from $983, 24 Nov to 3 Dec, found 6 days ago. January 2027 is the cheapest month for a one-way, from $384, 13 Jan 2027, found 7 days ago.
How far ahead should I book a flight from Ontario to Madrid?
In 49 days of prices between 24 Sept and 11 Nov, return fares 90 to 179 days before departure were typically 12% lower than 0 to 6 days before departure.
How long is the flight from Ontario to Madrid?
The cheapest one-way found recently, with British Airways on 18 Mar 2027, takes 15 h 10 min with 1 stop.
Which airlines have the cheapest flights from Ontario to Madrid?
Between 24 Nov and 14 Jun 2027, Iberia has the cheapest return on 2 of the 4 departure dates we hold, United Airlines on 1 and British Airways on 1. Between 13 Jan 2027 and 17 May 2027, American Airlines has the cheapest one-way on 1 of the 3 departure dates we hold, British Airways on 1 and United Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work