Ontario to Barcelona ONT → BCN
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
The cheapest return found recently is $877 with United Airlines, 21 Jan 2027 – 28 Jan 2027, found 5 days ago. The cheapest one-way found recently is $553 with United Airlines, 6 Apr 2027, found yesterday.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$877
21 Jan 2027 – 28 Jan 2027 · United Airlines
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
Leaves 5:00 a.m. · Return leaves 7:10 p.m. · 40 h 45 min of travel, both ways together
out 2 stops, back 1 stop
found 5 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$877 21 Jan 2027 – 28 Jan 2027found 5 days agoSee prices for these dates
$860 21 Jan 2027 – 28 Jan 2027found 6 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $747 to $877.
At $877, the cheapest return found recently is at the high end of that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Not enough comparable prices yet: we hold return fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 7-night return fares leaving within 3 days of 21 Jan 2027 to compare.
Every date we hold
3 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 27 Oct – 14 Nov | $1,079 | American Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 21 Jan 2027 – 28 Jan 2027 | $860 | Air Canada | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | out 2 stops, back 1 stop | found 6 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $860.
Airlines on the cheapest dates: American Airlines, Air Canada.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $513 to $602.
Cheapest one-way found recently
$553
6 Apr 2027 · United Airlines
Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN)
Leaves 5:00 a.m. · 18 h trip
2 stops
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$553 6 Apr 2027found yesterdayOpen this trip
$430 2 May 2027found 3 days agoOpen this trip
What have prices looked like?
Over 20 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $413 to $750.
20 days is a short history, so treat this range as an early guide.
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 18 Mar 2027 to 29 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 6 Apr 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 18 Mar 2027 | $540 | Air Canada | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 2 stops | found 2 days ago | Open this trip |
| 6 Apr 2027 | $553 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 2 stops | found yesterday | Open this trip |
| 2 May 2027 | $430 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 1 stop | found 3 days ago | Open this trip |
| 29 May 2027 | $750 | United Airlines | Ontario International Airport (ONT) → Barcelona-El Prat Airport (BCN) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
May 2027 is the cheapest month — from $430.
Airlines on the cheapest dates: United Airlines, Air Canada.
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 21 Jan 2027 – 28 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 6 Apr 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 20% lower than 7 to 13 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 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 | $1,079 | $1,079 | +26% | 7 |
| 60–89 days | $870 | $822 | +1% | 18 |
| 90–179 days | $860 | $747 | Cheapest seen | 25 |
| 180+ days | $873 | $873 | +2% | 12 |
One-way
Not enough history yet: in 20 days of one-way prices, 24 Sept to 18 Oct, 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
$526
$351 less than flying from Ontario
27 Oct – 14 Nov · LAX → BCN · out 1 stop, back 1 stop
found 5 days ago
Long Beach → Barcelona
60 km from Ontario
$1,035
$158 more than flying from Ontario
21 Jan 2027 – 28 Jan 2027 · LGB → BCN · out 2 stops, back 1 stop
found 5 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
$477
$76 less than flying from Ontario
5 Apr 2027 · SNA → BCN · 2 stops
found yesterday
Long Beach → Barcelona
60 km from Ontario
$579
$26 more than flying from Ontario
17 May 2027 · LGB → BCN · 2 stops
found 2 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 21 Jan 2027 – 28 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
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