$508 Cheap Flights from Glasgow (GLA) to Ontario (ONT)

View $508 flight on Wed, Feb 18, 2026Opens in a new window

Popular airlines from Glasgow International Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Glasgow to Ontario (GLA-ONT)

Prices were available within the past 7 days and start at $508 for one-way flights and $1,768 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air France
Tue, Dec 23 - Sat, Jan 3
GLA
Glasgow
ONT
Ontario
$1,768 Roundtrip, found 2 days ago
$1,768
Roundtrip
found 2 days ago
Select Air France flight, departing Tue, Dec 23 from Glasgow to Ontario, returning Sat, Jan 3, priced at $1,768 found 2 days ago
American Airlines
Tue, Dec 23 - Sat, Jan 3
GLA
Glasgow
ONT
Ontario
$2,199 Roundtrip, found 2 days ago
$2,199
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Dec 23 from Glasgow to Ontario, returning Sat, Jan 3, priced at $2,199 found 2 days ago
Finnair
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$2,499 Roundtrip, found 9 hours ago
$2,499
Roundtrip
found 9 hours ago
Select Finnair flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $2,499 found 9 hours ago
British Airways
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$2,501 Roundtrip, found 9 hours ago
$2,501
Roundtrip
found 9 hours ago
Select British Airways flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $2,501 found 9 hours ago
KLM
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$2,663 Roundtrip, found 1 day ago
$2,663
Roundtrip
found 1 day ago
Select KLM flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $2,663 found 1 day ago
Delta
Tue, Dec 23 - Sat, Jan 3
GLA
Glasgow
ONT
Ontario
$2,754 Roundtrip, found 2 days ago
$2,754
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Dec 23 from Glasgow to Ontario, returning Sat, Jan 3, priced at $2,754 found 2 days ago
KLM
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$2,965 Roundtrip, found 2 days ago
$2,965
Roundtrip
found 2 days ago
Select KLM flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $2,965 found 2 days ago
British Airways
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$3,072 Roundtrip, found 9 hours ago
$3,072
Roundtrip
found 9 hours ago
Select British Airways flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $3,072 found 9 hours ago
Delta
Thu, Dec 18 - Fri, Jan 2
GLA
Glasgow
ONT
Ontario
$3,251 Roundtrip, found 21 hours ago
$3,251
Roundtrip
found 21 hours ago
Select Delta flight, departing Thu, Dec 18 from Glasgow to Ontario, returning Fri, Jan 2, priced at $3,251 found 21 hours ago
Flights from Glasgow (GLA) to Ontario (ONT)
Origin airport
Glasgow Intl.
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
$1,768
Distance
5091 mi

Glasgow to Ontario Flights

The cheapest times to fly from Glasgow to Ontario

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 Glasgow to Ontario are during the month of December. You can find some of the cheapest flights from Glasgow to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Glasgow to Ontario

Sunday is one of the best days to book for cheap flights from Glasgow to Ontario: 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 Glasgow to Ontario

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 Glasgow to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from $508 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 Glasgow to Ontario 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 Glasgow to Ontario 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 Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Lock in a cheap one-way flight from $508 or cheap return flight from $1,768 from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)?
Traveling in December can help you save, as it's the cheapest month for flights between GLA and ONT. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline flying from GLA to ONT, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll need to hop on a flight with a layover when traveling from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from GLA to ONT?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change based on a range of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)?
To arrive at Los Angeles - Ontario Intl. Airport (ONT) on time, choose a flight that leaves from Glasgow Intl. Airport (GLA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until right before your break to book your flight from GLA to ONT generally means paying more. While you may find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary to boost your chances of snagging a bargain.
Is it cheaper to book a GLA to ONT flight and hotel package?
You'll typically save money by booking a GLA to ONT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've chosen your ideal flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Glasgow Intl. Airport (GLA) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your GLA to ONT flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.