$188 Cheap Flights from Ontario (ONT) to St. George (SGU)

View $188 flight on Fri, Jul 4, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to St. George Regional Airport (SGU)

Find available prices by choosing your travel dates.

Cheap Flights from Ontario to St. George (ONT-SGU)

Prices were available within the past 7 days and start at $188 for one-way flights and $218 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Aug 19 - Sat, Aug 23
ONT
Ontario
SGU
St. George
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Tue, Aug 19 from Ontario to St. George, returning Sat, Aug 23, priced at $218 found 1 hour ago
Delta
Sun, Jul 13 - Tue, Jul 29
ONT
Ontario
SGU
St. George
$224 Roundtrip, found 6 hours ago
$224
Roundtrip
found 6 hours ago
Select Delta flight, departing Sun, Jul 13 from Ontario to St. George, returning Tue, Jul 29, priced at $224 found 6 hours ago
American Airlines
Fri, May 9 - Mon, May 12
ONT
Ontario
SGU
St. George
$228 Roundtrip, found 1 day ago
$228
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, May 9 from Ontario to St. George, returning Mon, May 12, priced at $228 found 1 day ago
Delta
Sun, Jul 13 - Mon, Jul 28
ONT
Ontario
SGU
St. George
$238 Roundtrip, found 6 hours ago
$238
Roundtrip
found 6 hours ago
Select Delta flight, departing Sun, Jul 13 from Ontario to St. George, returning Mon, Jul 28, priced at $238 found 6 hours ago
Delta
Sun, Jul 13 - Wed, Jul 30
ONT
Ontario
SGU
St. George
$244 Roundtrip, found 6 hours ago
$244
Roundtrip
found 6 hours ago
Select Delta flight, departing Sun, Jul 13 from Ontario to St. George, returning Wed, Jul 30, priced at $244 found 6 hours ago
Delta
Sun, Apr 27 - Thu, May 15
ONT
Ontario
SGU
St. George
$248 Roundtrip, found 11 hours ago
$248
Roundtrip
found 11 hours ago
Select Delta flight, departing Sun, Apr 27 from Ontario to St. George, returning Thu, May 15, priced at $248 found 11 hours ago
Delta
Mon, Apr 28 - Thu, May 8
ONT
Ontario
SGU
St. George
$253 Roundtrip, found 16 hours ago
$253
Roundtrip
found 16 hours ago
Select Delta flight, departing Mon, Apr 28 from Ontario to St. George, returning Thu, May 8, priced at $253 found 16 hours ago
Delta
Sat, Apr 26 - Tue, May 6
ONT
Ontario
SGU
St. George
$259 Roundtrip, found 3 days ago
$259
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Apr 26 from Ontario to St. George, returning Tue, May 6, priced at $259 found 3 days ago
Delta
Mon, Oct 20 - Wed, Nov 5
ONT
Ontario
SGU
St. George
$264 Roundtrip, found 11 hours ago
$264
Roundtrip
found 11 hours ago
Select Delta flight, departing Mon, Oct 20 from Ontario to St. George, returning Wed, Nov 5, priced at $264 found 11 hours ago
United
Mon, May 12 - Tue, May 20
ONT
Ontario
SGU
St. George
$283 Roundtrip, found 2 days ago
$283
Roundtrip
found 2 days ago
Select United flight, departing Mon, May 12 from Ontario to St. George, returning Tue, May 20, priced at $283 found 2 days ago
Flights from Ontario (ONT) to St. George (SGU)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
St. George
Airlines serving
American Airlines, Delta, United
Roundtrip price
$218
Distance
307 mi

Ontario to St. George Flights

The cheapest times to fly from Ontario to St. George

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to St. George are during the month of August. You can find some of the cheapest flights from Ontario to St. George with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Ontario to St. George

Sunday is one of the best days to book for cheap flights from Ontario to St. George: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Ontario to St. George

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to St. George in 2025. You can also book with separate airlines for your outbound and return journeys, from $188 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to St. George flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to St. George airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU) cost?
Discover the latest flight deals from ONT to SGU by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONT to SGU?
The cheapest flights from ONT to SGU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU)?
You can’t fly directly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to St. George Airport (SGU). However, you can find other airports that offer nonstop flights. Start your journey at Los Angeles Intl. Airport (LAX) and head straight to St. George without any detours.
What is the cheapest airline that flies from ONT to SGU?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ONT to SGU. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU)?
You’ll have to take a flight with a layover if you’re traveling from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU). Direct flights don’t operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from ONT to SGU?
You’ll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU)?
To land at St. George Airport (SGU) on schedule, select a flight that leaves from Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU) last-minute?
Booking your flight from ONT to SGU right before your journey is typically more expensive. But if you’re flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book an ONT to SGU flight and hotel package?
Booking an ONT to SGU flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our wide range of stays and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to St. George Airport (SGU)?
It’s generally possible to reschedule or cancel your ONT to SGU flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find more details on our Customer Service portal.

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*Available to One Key members.