Find cheap Southwest flights to Ontario
ICT — ONT
Nov 7 — Nov 141
Round-trip
1 adult, Economy
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Cheapest Southwest flights from USA to OntarioExplore the most affordable Southwest flight options available from USA to Ontario. Find the lowest fares with prices last updated on October 8, 2026.
Explore the most affordable Southwest flight options available from USA to Ontario. Find the lowest fares with prices last updated on October 8, 2026.
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:05 am -
1 stop7h 05m
Sat 11/75:45 am -
1 stop3h 40m
Deal found 10/5![Southwest logo]()
$131
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:00 am -
1 stop3h 50m
Mon 11/95:20 pm -
1 stop6h 25m
Deal found 10/8![Southwest logo]()
$142
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:05 am -
1 stop4h 15m
Tue 11/103:20 pm -
1 stop6h 05m
Deal found 10/4![Southwest logo]()
$151
Best Southwest flights from USA to OntarioDiscover carefully curated Southwest flight deals from USA to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
Discover carefully curated Southwest flight deals from USA to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:50 am -
2 stops7h 40m
Tue 12/1512:50 pm -
2 stops7h 20m
Deal found 10/8![Southwest logo]()
$141
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:35 pm -
1 stop5h 35m
Thu 11/128:45 pm -
1 stop4h 35m
Deal found 10/8![Southwest logo]()
$152
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am -
2 stops9h 10m
Tue 11/105:00 pm -
1 stop4h 25m
Deal found 10/4![Southwest logo]()
$156
Direct Southwest flights from USA to OntarioExplore non-stop Southwest flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 8, 2026.
Explore non-stop Southwest flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 8, 2026.
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/128:25 am -
Nonstop1h 00m
Tue 1/1211:00 am -
Nonstop1h 05m
Deal found 10/8![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:20 pm -
Nonstop2h 25m
Sat 11/1411:20 am -
Nonstop2h 10m
Deal found 10/8![Southwest logo]()
$217
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:15 pm -
Nonstop1h 00m
Tue 11/33:20 pm -
Nonstop1h 10m
Deal found 10/5![Southwest logo]()
$229
Last-minute Southwest flights from USA to OntarioDiscover last-minute Southwest flight deals from USA to Ontario. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute Southwest flight deals from USA to Ontario. Data last updated October 8, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:05 am -
1 stop7h 05m
Sat 11/75:45 am -
1 stop3h 40m
Deal found 10/5![Southwest logo]()
$131
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:00 am -
1 stop3h 50m
Mon 11/95:20 pm -
1 stop6h 25m
Deal found 10/8![Southwest logo]()
$142
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:05 am -
1 stop4h 15m
Tue 11/103:20 pm -
1 stop6h 05m
Deal found 10/4![Southwest logo]()
$151
One-way Southwest flights to OntarioSearch for one-way Southwest flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
Search for one-way Southwest flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:30 pm -
1 stop3h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Southwest logo]()
$63
This Southwest deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:00 am -
1 stop4h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Southwest logo]()
$66
This Southwest deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:20 am -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Southwest logo]()
$67
Flights to Ontario with Southwest at a glance
Find detailed information about Southwest flights from USA to Ontario. Explore the options provided by Southwest to plan your journey from USA to Ontario. Data last updated October 8, 2026.
Cheapflights Insights
Find cheap Southwest flights to Ontario
US0-ONT
PDX-ONT
SFO-ONT
SEA-ONT
LAS-ONT
How long is the flight to Ontario with Southwest?
On average, Southwest flights from the United States to Ontario take 4 hours 20 minutes. Flights to Ontario from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
Southwest weekly flight availability to Ontario
The most flights to Ontario operated by Southwest are scheduled on a Monday (35 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).
When is the best time to book a flight to Ontario with Southwest?
The best time to book a flight to Ontario with Southwest is 88 days before departure. On average, fares are higher if you book 2 days before departure.
When is the cheapest time to fly to Ontario with Southwest?
Users looking for the cheapest Southwest fares to Ontario should consider flying on Saturday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.
FAQs about flights to Ontario with Southwest
Reviews of Southwest
See what Cheapflights users have to say about their Southwest experience.
Overview
Reviews
Southwest
4,222 reviews
Overview
Entertainment
7.4
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Recent reviews
10.0
|Sep 2026Changed flight which was easy. Gate Agent booked me from extra leg room seat on original flight to row 15 on new flight that did not have extra leg room - even though it was an exit row. The row in front of me with extra leg room had an empty seat.
4.0
|Sep 2026It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful
10.0
|Sep 2026I still think the aircraft should load from the back and window seats first for all passengers. It's so much easier and efficient to board when you do not have to worry about hitting Anyone already seated.
10.0
|Aug 2026great
10.0
|Jul 2026Good
1 out of 1408
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