Oakland to Ontario flights
The cheapest round trip we found from Oakland to Ontario is $101 (Jan 7 – 9, 2027, Nonstop), 3% below the usual $104.
OAK to ONT · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Buy now or wait? We're still learning this route. We have 5 days of prices so far and need about a week to say whether to book or wait.
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $106 |
| December 2026 | $103 |
| January 2027 | $101 (cheapest month) |
| February 2027 | No fares found yet |
| March 2027 | $138 |
Cheapest dates in the next 4 months
Round trip, per person-
Jan 7 – 9, 2027 2 nights · leave Thu$101$101 Book
Southwest Airlines Nonstop · 1h 20m -
Jan 18 – 26, 2027 8 nights · leave Mon$102$102 Book
Southwest Airlines Nonstop · 1h 20m
-
Dec 2 – 4 2 nights · leave Wed$103$103 Book
Southwest Airlines Nonstop · 1h 15m
-
Nov 26 – Dec 3 7 nights · leave Thu$106$106 Book
Southwest Airlines Nonstop · 1h 20m
-
Dec 4 – 6 2 nights · leave Fri$131 +26% vs usual$131 +26% vs usual Book
Southwest Airlines Nonstop · 1h 20m
-
Nov 25 – 29 4 nights · leave Wed$218 +110% vs usual$218 +110% vs usual Book
Southwest Airlines Nonstop · 1h 25m
-
Nov 6 – 8 2 nights · leave Fri$358 +244% vs usual$358 +244% vs usual Book
Frontier Airlines 1 stop · 2h 44m -
Nov 16 – 22 6 nights · leave Mon$816 +685% vs usual$816 +685% vs usual Book
Alaska Airlines 1 stop · 4h 04m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Ontario · Jan 7 – 9, 2027- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in Ontario Klook · tours and tickets (opens Klook in a new tab)
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Good to know
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Oakland to Ontario: questions
How much does a flight from Oakland to Ontario cost?
The cheapest round trip we have found right now is $101, leaving January 7 and returning January 9. The usual price on this route is about $104, so this fare is 3% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Oakland to Ontario?
January 2027, with round trips from $101. The most expensive month in our data is March (from $138). Based on the 4 months ahead we have prices for.
Are there nonstop flights from Oakland to Ontario?
Yes. Nonstop from $101 round trip. 67% of the 9 date combinations we track are nonstop.
Which airports do Oakland to Ontario flights use?
Oakland airports include Metropolitan Oakland International (OAK). Ontario airports include Ontario International (ONT). The prices on this page cover every airport in both cities (OAK and ONT are the city codes).
About this route
We track round-trip economy fares from Oakland (United States) to Ontario (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $101, departing January 7 and returning January 9 on a nonstop flight, about 3% below the usual $104. Right now we're following 9 upcoming date combinations on this route. The cheapest month to fly in our data is January, from $101. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.