How the cheapest fare moved
Oct 22: €54
€54
Oct 15
Oct 22
low €17 · high €124
Departure-day prices · January 2027 San Francisco → Ontario
‹ Prev
Next ›
Mon
Tue
Wed
Thu
Fri
Sat
Sun
1
2
3 €273 4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Cheapest days highlighted · darker = pricier · past days greyed out · cached one-way fares.
Return-day prices · January 2027 Ontario → San Francisco
‹ Prev
Next ›
Mon
Tue
Wed
Thu
Fri
Sat
Sun
1
2
3
4 €125 5
6 €118 7
8 €121 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Cheapest days highlighted · darker = pricier · past days greyed out · cached one-way fares.
Best time to visit Ontario — climate Jan: ~19°C daytime, 2 rainy days
19°
Jan Feb: ~20°C daytime, 6 rainy days
20°
Feb Mar: ~19°C daytime, 10 rainy days
19°
Mar Apr: ~23°C daytime, 4 rainy days
23°
Apr May: ~28°C daytime, 2 rainy days
28°
May Jun: ~31°C daytime, 1 rainy days
31°
Jun Jul: ~32°C daytime, 0 rainy days
32°
Jul Aug: ~35°C daytime, 0 rainy days
35°
Aug Sep: ~32°C daytime, 1 rainy days
32°
Sep Oct: ~26°C daytime, 4 rainy days
26°
Oct Nov: ~22°C daytime, 7 rainy days
22°
Nov Dec: ~21°C daytime, 5 rainy days
21°
Dec Best value: Dec — fares from €17 and ~21°C daytime.
Flights from San Francisco to Ontario start around €17 (direct flights available). Range seen recently: €17–70, based on 4 fares found by travellers.
Fly (from €17)
1h 26m duration
€17–70 recent fares
Book
Cheapest cached fares San Francisco → Ontario; direct flights available (e.g. F9). · Based on 4 fares found by travellers in the last 48h
Cheapest round trips to Ontario Fares found by travellers in the last 48 hours — refreshed daily.
Dec 15 – Jan 5
Frontier Airlines · Direct · 1h 27m
€27
Book
Nov 16 – Nov 22
Frontier Airlines · Direct · 1h 26m
€60
Book
Nov 6 – Nov 8
Frontier Airlines · Direct · 1h 26m
€98
Book
Nov 13 – Nov 15
Frontier Airlines · Direct · 1h 26m
€109
Book
Nov 2 – Nov 5
Frontier Airlines · Direct · 1h 26m
€116
Book
Nov 6 – Nov 9
Frontier Airlines · Direct · 1h 26m
€130
Book
Feb 24 – Feb 27
Southwest Airlines · 1 stop · 2h 30m
€132
Book
Nov 14 – Nov 16
United Airlines · Direct · 1h 25m
€141
Book
Weather in Ontario
Thu
☁️
19°
14°
💧48%
Fri
☁️
21°
13°
💧8%
Sat
☀️
25°
17°
💧0%
Sun
☀️
27°
19°
💧0%
Mon
🌤️
29°
20°
💧0%
Tue
☁️
27°
21°
💧0%
Wed
☁️
25°
20°
💧1%
In Jan, Ontario typically sees ~20°C daytime highs and 6 rainy days.
Where to stay in Ontario 3★+ hotels from €60/night (32 hotels sampled, ~3 weeks out).
Rodeway Inn & Suites Ontario
hotel · Ontario
from €60/night ★ 3
Studio 6 Ontario CA Convention Center Airport
hotel · Ontario
from €62/night ★ 3
Motel 6 Ontario, OR
hotel · Ontario
from €63/night ★ 3
Good to know Time difference Same time zone
Time in the air 1h 25m
Things to do in Ontario Top-rated tours and tickets from €41 — book ahead for the popular ones.
Tours and tickets provided by Viator (a Tripadvisor company). Some links earn Stayonomy a commission.
About Ontario
Ontario is Canada's second-largest province, and the most populous, with more than 14 million inhabitants. It is home to the Canadian capital city of Ottawa, and Toronto, which is Ontario's capital and Canada's largest city.
Stretching from the shores of Hudson Bay (an arm of the Arctic Ocean) in the north to four of the five Great Lakes in the South and from Manitoba in the west to Quebec in the east, Ontario is truly massive at over a million square kilometres (almost half a million square miles).
Read the full Ontario guide
Guide content from Wikivoyage contributors (CC BY-SA).
Popular from San Francisco Cheapest destinations travellers searched recently — refreshed daily.
Flight prices are real fares travellers found in the last 48 hours, refreshed daily — the booking site confirms the final price. Train, bus and ferry fares are shown on the operators' booking sites. Weather data by Open-Meteo ; exchange rates: ECB reference. Data updated 2026-10-22. Some links earn Stayonomy a commission at no cost to you.