Your next trip, last seen at €106
Lowest observedFrontier Airlines · 3 stops · One wayWhen 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.
- Lowest observed
- €106, departing 8 Dec 2026 (Last checked: 9 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 89Check live prices for this route
- Airlines seen
- Alaska Airlines, Frontier Airlines, JetBlue, Southwest Airlines, United Airlines
- Typical journey time
- 19h 44m
About this route
Explore the fares we observed from Philadelphia to Ontario. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,792 km
- Typical journey time
- 19h 44m
- Airlines seen
- Alaska Airlines, Frontier Airlines, JetBlue, Southwest Airlines, United Airlines
- Seen on fares with a connection
- Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines
- Alternative airports
- TTN
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
Airport to city: straight-line distance
- Philadelphia International Airport (PHL) → Philadelphia, city gazetteer reference point (39.9523, -75.1638): ≈ 11 km.
- Trenton Mercer Airport (TTN) → Philadelphia, city gazetteer reference point (39.9523, -75.1638): ≈ 47 km.
- Ontario International Airport (ONT) → Ontario, city gazetteer reference point (34.0500, -117.6400): ≈ 4 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 Philadelphia to Ontario: December 2026, from €106 (checked 9 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €165 | 20 |
| November 2026 | €124 | 30 |
| December 2026 | €106 | 30 |
| January 2027 | €159 | 9 |
Lowest fare by day of the week
Cheapest day of the week from Philadelphia to Ontario: Tuesday, from €106 (checked 9 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €110 | 13 |
| Tuesday | €106 | 13 |
| Wednesday | €131 | 13 |
| Thursday | €138 | 13 |
| Friday | €133 | 13 |
| Saturday | €163 | 13 |
| Sunday | €141 | 11 |
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 Philadelphia to Ontario by days until departure (31 to 60 days): €106 (checked 9 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €222 | 8 |
| 8 to 30 days | €127 | 23 |
| 31 to 60 days | €106 | 30 |
| 61 days or more | €111 | 28 |
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 Philadelphia to Ontario: Frontier Airlines, from €106 (checked 9 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €106Dec 8, 2026 | 75 |
| United Airlines | €165Nov 14, 2026 | 13 |
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 Philadelphia to Ontario?
The lowest fare we have observed is €106, found on 9 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Philadelphia to Ontario?
Cheapest month from Philadelphia to Ontario: December 2026, from €106 (checked 9 Oct 2026).
Are there direct flights from Philadelphia to Ontario?
Our data holds no non-stop flight from Philadelphia to Ontario. The fares on this page include at least one stop.
Which airlines fly from Philadelphia to Ontario?
These are the carriers we have seen on the route: Alaska Airlines, Frontier Airlines, JetBlue, Southwest Airlines, United Airlines.
How long does the flight from Philadelphia to Ontario take?
The average journey time across the 90 fares we observed is 20h 38m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
Which day of the week is cheapest from Philadelphia to Ontario?
Cheapest day of the week from Philadelphia to Ontario: Tuesday, from €106 (checked 9 Oct 2026).
Which airline has the lowest fare from Philadelphia to Ontario?
Cheapest airline from Philadelphia to Ontario: Frontier Airlines, from €106 (checked 9 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 9 Oct 2026