San Francisco to Ontario in October 2026
Round trips departing in October · Economy · Prices per person in USD
Prices updated
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when October fares drop below your price.October 2026 by departure day
Cheapest round trip leaving that day| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 1 $299 | 2 $259 | 3 $340 | 4 | |||
| 5 | 6 | 7 | 8 $189 | 9 $179 | 10 | 11 |
| 12 | 13 | 14 $170 | 15 | 16 $126 | 17 | 18 |
| 19 $86 | 20 | 21 | 22 | 23 $117 | 24 | 25 |
| 26 | 27 $88 | 28 | 29 $125 | 30 $121 | 31 $81 |
Empty days: no round trip found for that departure date yet. Green = cheapest third of the month.
Cheapest dates in October 2026
Round trip, per person-
Oct 31 – Nov 5 5 nights · leave Sat$81Frontier Airlines 1 stop · 5h 01mBook
-
Oct 19 – 30 11 nights · leave Mon$86Frontier Airlines Nonstop · 1h 38mBook
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Oct 27 – 29 2 nights · leave Tue$88United Airlines Nonstop · 1h 26mBook
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Oct 23 – 26 3 nights · leave Fri$117Frontier Airlines Nonstop · 1h 38mBook
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Oct 30 – Nov 1 2 nights · leave Fri$121Frontier Airlines Nonstop · 1h 26mBook
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Oct 29 – Nov 1 3 nights · leave Thu$125Frontier Airlines Nonstop · 1h 26mBook
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Oct 16 – 18 2 nights · leave Fri$126Frontier Airlines Nonstop · 1h 38mBook
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Oct 14 – 18 4 nights · leave Wed$170United Airlines Nonstop · 1h 26mBook
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Oct 9 – 11 2 nights · leave Fri$179Frontier Airlines Nonstop · 1h 38mBook
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Oct 8 – 11 3 nights · leave Thu$189Frontier Airlines Nonstop · 1h 38mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
Good to know for October
October vs other months
Cheapest round trip per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $81 |
| November 2026 | $53 (cheapest month) |
| December 2026 | $166 |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | $264 |
San Francisco to Ontario in October: questions
What's the cheapest date to fly from San Francisco to Ontario in October 2026?
Leaving Saturday, October 31 and returning Thursday, November 5 (5 nights) for $81 round trip on Frontier Airlines, the cheapest of the 13 date combinations we track that month.
How much is a round trip from San Francisco to Ontario in October 2026?
From $81. Half of the 13 date combinations we track are under $126. Prices are per person in USD and change often.
Is October a cheap month to fly from San Francisco to Ontario?
It ranks 2 of 4 months we have prices for. The cheapest month is November 2026, from $53.