Cheap flights from Ontario to Barcelona from $494 ONT → BCN
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
The cheapest return found recently is $1,409 with Air Canada, 28 Nov – 5 Dec, found 2 days ago. The cheapest one-way found recently is $494 with United Airlines, 12 Aug 2027, found 4 days ago.
- Cheapest one-way found recently
- $494, found 4 days ago
- Cheapest return found recently
- $1,409, 28 Nov to 5 Dec
- Usual return price
- $1,161 to $1,409
- Cheapest month to fly
- April 2027, return fares from $1,113 found in the last 7 days
Return
The cheapest return fare on each of 5 departure dates is usually $1,161 to $1,409.
Cheapest return found recently
$1,409
28 Nov – 5 Dec · Air Canada
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
Leaves 6:00 a.m. · Return leaves 6:45 a.m. · 36 h 5 min of travel, both ways together
out 2 stops, back 1 stop
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,409 28 Nov – 5 Decfound 2 days agoSee prices for these dates
$1,113 1 Apr 2027 – 20 Apr 2027found 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 $747 to $1,123.
At $1,409, 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 5 departure dates from 19 Nov to 12 Jul 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 7-night return fares leaving within 3 days of 28 Nov to compare.
Every date we hold
6 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 19 Nov – 10 Jan 2027 | $1,690 | Frontier Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 2 stops, back 1 stop | found 7 days ago | See prices for these dates |
| 28 Nov – 5 Dec | $1,409 | Air Canada | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 2 stops, back 1 stop | found 2 days ago | See prices for these dates |
| 3 Jan 2027 – 10 Jan 2027 | $1,161 | American Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 2 stops, back 1 stop | found 7 days ago | See prices for these dates |
| 1 Apr 2027 – 20 Apr 2027 | $1,113 | American Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 12 Jul 2027 – 29 Jul 2027 | $1,212 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
April 2027 is the cheapest month — from $1,113.
Airlines on the cheapest dates: American Airlines, Frontier Airlines, Air Canada, United Airlines.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $497 to $772.
Cheapest one-way found recently
$494
12 Aug 2027 · United Airlines
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
Leaves 4:03 p.m. · 18 h 42 min trip
2 stops
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$494 12 Aug 2027found 4 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 34 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $412 to $755.
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 4 departure dates from 2 Jun 2027 to 13 Aug 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?
No. We hold one-way fares on 1 other departure date within 3 days of 12 Aug 2027, and it is not cheaper.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Jun 2027 | $823 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 2 stops | found 7 days ago | Open this trip |
| 8 Jun 2027 | $755 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 1 stop | found 7 days ago | Open this trip |
| 12 Aug 2027 | $494 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 2 stops | found 4 days ago | Open this trip |
| 13 Aug 2027 | $498 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
August 2027 is the cheapest month — from $494.
Airlines on the cheapest dates: United Airlines.
Premium cabin fares from Ontario to Barcelona
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 28 Nov – 5 Dec in another cabin: Premium economy · Business · First
Today's prices for 12 Aug 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Barcelona?
Return
Fares 90 to 179 days before departure were typically 44% lower than 7 to 13 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 |
|---|---|---|---|---|
| 7–13 days | $1,565 | $1,079 | +78% | 15 |
| 14–29 days | $1,256 | $1,091 | +43% | 15 |
| 60–89 days | $913 | $822 | +4% | 29 |
| 90–179 days | $877 | $747 | Cheapest seen | 49 |
| 180+ days | $1,111 | $873 | +27% | 20 |
One-way
Not enough history yet: in 34 days of one-way prices, 24 Sept 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 → Barcelona
56 km from Ontario
$749
$660 less than flying from Ontario
26 Nov – 3 Dec · LAX → BCN · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Barcelona
56 km from Ontario
$402
$92 less than flying from Ontario
13 Aug 2027 · LAX → BCN · 1 stop
found 4 days ago
Long Beach → Barcelona
60 km from Ontario
$572
$78 more than flying from Ontario
13 Aug 2027 · LGB → BCN · 2 stops
found 4 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 28 Nov – 5 Dec. 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 Barcelona?
The cheapest return found recently is $1,409 with Air Canada, 28 Nov to 5 Dec, found 2 days ago. The cheapest return we hold, of any age, is $1,113 with American Airlines, 1 Apr 2027 to 20 Apr 2027, found 6 days ago. The cheapest return fare on each of 5 departure dates is usually $1,161 to $1,409.
How much is a one-way flight from Ontario to Barcelona?
The cheapest one-way found recently is $494 with United Airlines, 12 Aug 2027, found 4 days ago. The cheapest one-way fare on each of 4 departure dates is usually $497 to $772.
What is the cheapest month to fly from Ontario to Barcelona?
April 2027 is the cheapest month for a return, from $1,113, 1 Apr 2027 to 20 Apr 2027, found 6 days ago. August 2027 is the cheapest month for a one-way, from $494, 12 Aug 2027, found 4 days ago.
How far ahead should I book a flight from Ontario to Barcelona?
In 49 days of prices between 24 Sept and 11 Nov, return fares 90 to 179 days before departure were typically 44% lower than 7 to 13 days before departure.
How long is the flight from Ontario to Barcelona?
The cheapest one-way found recently, with United Airlines on 12 Aug 2027, takes 18 h 42 min with 2 stops.
Which airlines have the cheapest flights from Ontario to Barcelona?
Between 19 Nov and 12 Jul 2027, American Airlines has the cheapest return on 2 of the 5 departure dates we hold, Frontier Airlines on 1 and Air Canada on 1. Between 2 Jun 2027 and 13 Aug 2027, United Airlines has the cheapest one-way on all 4 departure dates we hold.
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