Cheapest routes found recently
Cheapest price by month
| Month | Round trip from |
|---|---|
| November 2026 | $148 |
| December 2026 | $144 |
| February 2027 | $224 |
| March 2027 | $527 |
| April 2027 | $273 |
Weather by month
Ontario is warmest in August, when days reach about 34 °C, and coolest in December, when nights fall to about 5 °C. The wettest month is February, with about 79 mm of rain, and the driest June, with about 1 mm.
| Month | Day °C | Night °C | Rain |
|---|---|---|---|
| January | 18.9° | 5.3° | 76 mm moderate |
| February | 19.9° | 6.1° | 79 mm moderate |
| March | 20.7° | 7.0° | 69 mm moderate |
| April | 23.9° | 8.5° | 26 mm dry |
| May | 25.9° | 11.1° | 8 mm dry |
| June | 29.8° | 13.5° | 1 mm dry |
| July | 33.3° | 15.9° | 1 mm dry |
| August | 33.6° | 16.5° | 4 mm dry |
| September | 31.5° | 15.0° | 9 mm dry |
| October | 27.6° | 11.6° | 10 mm dry |
| November | 22.9° | 7.3° | 40 mm moderate |
| December | 19.4° | 4.7° | 50 mm moderate |
Best time to go
For low fares and pleasant weather together, the best time in Ontario is November, December, with flights from $144.
-
November
$148
23 °C moderate
-
December
$144
19 °C moderate
Cheapest departure city each month
Airports
100% of the cheapest flights to Ontario land at Ontario International Airport, 4 km from the centre.
- Ontario International Airport ONT 4 km from centre · 100% of arrivals
Airlines
-
American Airlines
1 route
-
Frontier Airlines
1 route
-
United Airlines
1 route
-
Southwest Airlines
1 route
Practical facts
Prices are paid in USD. Clocks are set to UTC-8. Sockets are type A, B and the mains supply is 120 V, 60 Hz. The main language is English. The international dialling code is +1, and traffic drives on the right.
-
USD
Currency
-
UTC-8
Time zone
-
A, B
Plug type
-
120 V, 60 Hz
Mains supply
-
English
Languages
-
+1
Dialling code
-
Right
Traffic
-
eSIM
Mobile data · Airalo
Also consider flying to
-
Los Angeles
56 km away $36 -
San Diego
155 km away $56 -
Las Vegas
328 km away $38
Questions and answers
- Which month is the cheapest to fly to Ontario?
- December is currently the cheapest month, with tickets from $144.
- From where is it cheapest to fly to Ontario right now?
- The cheapest departure city found is Houston, from $148 in November.
- Are there direct flights to Ontario?
- Yes. Of 1 route with recent prices, 1 has a direct flight.
- Which airlines fly to Ontario?
- Airlines found on these routes: American Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
- Is there a cheaper nearby airport for Ontario?
- Los Angeles is 56 km away, with flights from $36.
- What is the weather like in Ontario in August?
- The warmest month in Ontario is August, with daytime highs around 34 °C and about 4 mm of rain.
- When is the best time to visit Ontario?
- The best time is November, December: fares in the cheapest third of the year paired with comfortable weather, from $144.
- Which currency is used in Ontario?
- The currency is USD. Sockets are type A, B and the mains supply is 120 V, 60 Hz.
- Which airport should I fly into for Ontario?
- Ontario International Airport takes 100% of the cheapest flights and is 4 km from the centre.
Prices last updated Nov. 4, 2026
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