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Find cheap Southwest flights to Ontario from $76

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Flights Deals

Cheap Southwest Flight Deals to Ontario

 
Here are some of the best deals found on KAYAK recently from Southwest to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip Southwest flight deals to Ontario

KAYAK's recommended round-trip Southwest deals departing in the coming months to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Southwest Logo
5:15 am - 10:35 amSFO-ONT
5h 20m1 stop
Southwest Logo
3:40 pm - 10:15 pmONT-SFO
6h 35m1 stop
$151Southwest
Find Deal
Tue, May 13 - Wed, May 14
Southwest Logo
5:15 am - 10:35 amSFO-ONT
5h 20m1 stop
Southwest Logo
3:40 pm - 10:40 pmONT-SFO
7h 00m2 stops
$156Southwest
Find Deal
Tue, May 13 - Wed, May 14
Southwest Logo
4:25 pm - 9:10 pmSEA-ONT
4h 45m1 stop
Southwest Logo
4:10 pm - 10:20 pmONT-SEA
6h 10m1 stop
$157Southwest
Find Deal
Sat, May 24 - Wed, May 28
Southwest Logo
5:55 pm - 10:40 pmSFO-ONT
4h 45m1 stop
Southwest Logo
5:25 pm - 11:25 pmONT-SFO
6h 00m1 stop
$173Southwest
Find Deal
Wed, Jul 16 - Tue, Jul 22
Southwest Logo
5:25 am - 11:00 amSFO-ONT
5h 35m1 stop
Southwest Logo
7:35 pm - 12:15 amONT-SFO
4h 40m1 stop
$174Southwest
Find Deal
Wed, Jun 25 - Mon, Jun 30
Southwest Logo
5:30 am - 11:35 amSEA-ONT
6h 05m1 stop
Southwest Logo
6:00 pm - 10:30 pmONT-SEA
4h 30m1 stop
$187Southwest
Find Deal
Sun, Jun 1 - Wed, Jun 4
Southwest Logo
5:25 am - 11:00 amSFO-ONT
5h 35m1 stop
Southwest Logo
8:45 pm - 12:20 amONT-SFO
3h 35m1 stop
$204Southwest
Find Deal
Wed, Jun 25 - Sun, Jun 29
Southwest Logo
6:35 am - 3:40 pmSFO-ONT
9h 05m2 stops
Southwest Logo
5:25 pm - 11:25 pmONT-SFO
6h 00m1 stop
$207Southwest
Find Deal
Wed, Jul 16 - Tue, Jul 22
Southwest Logo
5:00 am - 10:00 amSFO-ONT
5h 00m1 stop
Southwest Logo
3:40 pm - 10:40 pmONT-SFO
7h 00m2 stops
$209Southwest
Find Deal
Sat, May 10 - Tue, May 13
Southwest Logo
6:00 am - 11:00 amSEA-ONT
5h 00m1 stop
Southwest Logo
2:35 pm - 9:00 pmONT-SEA
6h 25m1 stop
$217Southwest
Find Deal
Thu, May 15 - Tue, May 20
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Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$76
Average price round-trip$307
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from San Francisco to Ontario
(price for this month)

When to book flights with Southwest to Ontario

Average price per month
Flight prices as travel date approaches

FAQs for flying to Ontario with Southwest

  • Which other airlines fly to Ontario?

    Along with Southwest, you can also fly to Ontario with Delta, American Airlines, Frontier, Hawaiian Airlines, JetBlue, United Airlines, United Airlines and Delta.

  • How much is a flight to Ontario with Southwest?

    On average, Southwest flights to Ontario cost $224 one-way.

  • Which airport do Southwest flights to Ontario fly into?

    You’ll fly into Ontario Airport when flying to Ontario with Southwest.

Top tips for your flights to Ontario with Southwest

  • The cheapest flight to Ontario with Southwest found on KAYAK in the last 2 weeks departed from San Jose and cost $48.

Southwest customer reviews

8.0
Very goodBased on 4,294 verified guest reviews
7.6Entertainment
8.0Comfort
8.2Boarding
8.6Crew
7.1Food
Pros +
Cons -
Show reviews that mention
Traveler rating:
Sort by:
K
8.0 Very good
Start drink service earlier. We were rushed.
J
8.0 Very good
It is southwest seat was ok. Not the most comfortable seat
H
6.0 Okay
They were more than 2 hours late.
H
10.0 Wonderful
Good
J
8.0 Very good
I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight
J
6.0 Okay
The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.
A
10.0 Wonderful
Plz don't take away free bags and free seating
D
6.0 Okay
The seats were a bit cramped and worn, but otherwise okay.
D
6.0 Okay
The seats were a bit cramped, but otherwise okay.
A
8.0 Very good
It departed late
Read more about Southwest

Everything you need to know for your flight to Ontario

Other airlines flying to Ontario

Flight deals from the most popular airlines with KAYAK users flying the route
Frontier flights to Ontario
United Airlines flights to Ontario
Alaska Airlines flights to Ontario
Delta flights to Ontario
American Airlines flights to Ontario

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