Cheap flights from Ontario to Oakland from $196 ONT → OAK
Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK)
The cheapest one-way found recently is $196 with Southwest Airlines, 15 Jun 2027, found yesterday.
- Cheapest one-way found recently
- $196, Southwest Airlines, found yesterday
- Cheapest month to fly
- May 2027, one-way fares from $187 found in the last 7 days
- Airlines with nonstop flights
- Southwest Airlines
- Shortest nonstop flight found
- 1 h 15 min
One-way
The cheapest one-way fare on each of 4 departure dates is usually $194 to $208.
Cheapest one-way found recently
$196
15 Jun 2027 · Southwest Airlines
Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK)
Leaves 6:00 a.m. · 1 h 15 min trip
nonstop
found yesterday
Cheapest nonstop one-way
$196
15 Jun 2027 · Southwest Airlines
Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK)
Leaves 6:00 a.m. · 1 h 15 min trip
nonstop
found yesterday
Found recently, and the cheapest we hold
$196 15 Jun 2027found yesterdayOpen this trip
$187 5 May 2027found 3 days agoOpen this trip
What have prices looked like?
Over 48 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $68 to $211.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 15 Apr 2027 to 15 Jun 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 15 Jun 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 15 Apr 2027 | $202 | Southwest Airlines | Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK) | nonstop | found 3 days ago | Open this trip |
| 5 May 2027 | $187 | Southwest Airlines | Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK) | nonstop | found 3 days ago | Open this trip |
| 16 May 2027 | $224 | Southwest Airlines | Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK) | nonstop | found today | Open this trip |
| 15 Jun 2027 | $196 | Southwest Airlines | Ontario International Airport (ONT) → Metropolitan Oakland International Airport (OAK) | nonstop | found yesterday | Open this trip |
Which month looks cheapest?
May 2027 is the cheapest month — from $187.
Airlines on the cheapest dates: Southwest Airlines.
Premium cabin fares from Ontario to Oakland
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 15 Jun 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Oakland?
One-way
The cheapest fares were 14 to 29 days before departure.
From the cheapest one-way each day between 24 Sept and 12 Nov (48 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $68 | $68 | Cheapest seen | 7 |
| 30–59 days | $136 | $105 | +100% | 9 |
| 90–179 days | $163 | $159 | +140% | 25 |
| 180+ days | $178 | $159 | +162% | 44 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Ontario → San Francisco
13 km from Oakland
$38
5 Dec – 8 Dec · ONT → SFO · out nonstop, back nonstop
found yesterday
Long Beach → Oakland
60 km from Ontario
$122
5 Dec – 8 Dec · LGB → OAK · out nonstop, back nonstop
found yesterday
Ontario → San Jose
61 km from Oakland
$164
3 Dec – 3 Dec · ONT → SJC · out nonstop, back nonstop
found today
Los Angeles → Oakland
56 km from Ontario
$403
2 Dec – 4 Dec · BUR → OAK · out 1 stop, back 1 stop
found yesterday
Ontario → Sacramento
110 km from Oakland
$213
29 Jan 2027 – 9 Feb 2027 · ONT → SMF · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Ontario → San Francisco
13 km from Oakland
$20
$176 less than flying to Oakland
8 Dec · ONT → SFO · nonstop
found yesterday
Ontario → San Jose
61 km from Oakland
$82
$114 less than flying to Oakland
11 Dec · ONT → SJC · 1 stop
found 2 days ago
Los Angeles → Oakland
56 km from Ontario
$110
$86 less than flying from Ontario
5 Dec · BUR → OAK · nonstop
found yesterday
Ontario → Sacramento
110 km from Oakland
$124
$72 less than flying to Oakland
17 Feb 2027 · ONT → SMF · 1 stop
found today
Long Beach → Oakland
60 km from Ontario
$191
$5 less than flying from Ontario
16 May 2027 · LGB → OAK · nonstop
found today
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 15 Jun 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Ontario to Oakland?
The cheapest one-way found recently is $196 with Southwest Airlines, 15 Jun 2027, found yesterday. The cheapest one-way we hold, of any age, is $187 with Southwest Airlines, 5 May 2027, found 3 days ago. The cheapest one-way fare on each of 4 departure dates is usually $194 to $208.
What is the cheapest month to fly from Ontario to Oakland?
May 2027 is the cheapest month for a one-way, from $187, 5 May 2027, found 3 days ago.
How far ahead should I book a flight from Ontario to Oakland?
In 48 days of prices between 24 Sept and 12 Nov, one-way fares were cheapest 14 to 29 days before departure.
Is there a direct flight from Ontario to Oakland?
Yes, the cheapest nonstop one-way found recently is $196 with Southwest Airlines, 15 Jun 2027, found yesterday.
How long is the flight from Ontario to Oakland?
The cheapest nonstop one-way found recently, with Southwest Airlines on 15 Jun 2027, takes 1 h 15 min from Ontario International Airport (ONT) to Metropolitan Oakland International Airport (OAK).
Which airlines have the cheapest flights from Ontario to Oakland?
Between 15 Apr 2027 and 15 Jun 2027, Southwest Airlines has the cheapest one-way on all 4 departure dates we hold.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work