Ontario to Barcelona flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Ontario to Barcelona is €371 (checked on 31 Oct 2026).
Your next trip, last seen at €371
Lowest observedWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €371, departing 30 Dec 2026 (Last checked: 31 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 124Check live prices for this route
- Airlines seen
- American Airlines, Delta Air Lines, Iberia, United Airlines
- Typical journey time
- 14h
About this route
Explore the fares we observed from Ontario to Barcelona. Prices move often, so pick your dates to see the latest options.
- Route distance
- 9,618 km
- Typical journey time
- 14h
- Seen on fares with a connection
- Delta Air Lines, American Airlines, United Airlines
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- Ontario International Airport (ONT) → Ontario, city gazetteer reference point (34.0500, -117.6400): ≈ 4 km.
- Barcelona El Prat (BCN) → Barcelona, city gazetteer reference point (41.3879, 2.1699): ≈ 12 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Ontario to Barcelona: December 2026, from €371 (checked 31 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €568 | 10 |
| December 2026 | €371 | 31 |
| January 2027 | €373 | 31 |
| February 2027 | €373 | 21 |
| March 2027 | €476 | 7 |
| April 2027 | €373 | 24 |
Lowest fare by day of the week
Cheapest day of the week from Ontario to Barcelona: Wednesday, from €371 (checked 31 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €373 | 17 |
| Tuesday | €373 | 17 |
| Wednesday | €371 | 17 |
| Thursday | €417 | 18 |
| Friday | €415 | 18 |
| Saturday | €373 | 19 |
| Sunday | €373 | 18 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Ontario to Barcelona by days until departure (31 to 60 days): €371 (checked 31 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 8 to 30 days | €568 | 14 |
| 31 to 60 days | €371 | 30 |
| 61 days or more | €373 | 80 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Ontario to Barcelona: American Airlines, from €373 (checked 31 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| American Airlines | €373Dec 27, 2026 | 5 |
| Delta Air Lines | €373Dec 28, 2026 | 6 |
| United Airlines | €373Dec 27, 2026 | 4 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Ontario to Barcelona?
The lowest fare Routavio has observed is €371, found on 31 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Ontario to Barcelona?
Cheapest month from Ontario to Barcelona: December 2026, from €371 (checked 31 Oct 2026).
Are there direct flights from Ontario to Barcelona?
Our data holds no non-stop flight from Ontario to Barcelona. The fares on this page include at least one stop.
Which airlines fly from Ontario to Barcelona?
Routavio has seen these carriers on the route: American Airlines, Delta Air Lines, Iberia, United Airlines.
Which day of the week is cheapest from Ontario to Barcelona?
Cheapest day of the week from Ontario to Barcelona: Wednesday, from €371 (checked 31 Oct 2026).
Which airline has the lowest fare from Ontario to Barcelona?
Cheapest airline from Ontario to Barcelona: American Airlines, from €373 (checked 31 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.