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Cheap flights from Glasgow Intl Airport to Ontario from £489

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — ONT
27 Aug — 3 Sep1
1 adult

Cheap flight deals from Glasgow Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Glasgow Intl (GLA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 August 2025.

Round-trip from

£489

Popular in

August

Cheapest in

March

Average price

£841
Delta
  • Delta
  • 2/9-10/9
  • 4 total stops
  • 35h 13m total
  • Glasgow to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£73 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Glasgow Intl to Ontario

Cheapest flights from Glasgow Intl to Ontario
Explore the most affordable flight options available from Glasgow Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 August 2025.

Tue 2/906:00GLA - ONT
2 stops18h 08mDelta
Wed 10/907:05ONT - GLA
2 stops17h 05mDelta
Deal found 19/8£489
Mon 1/906:00GLA - ONT
2 stops24h 40mDelta
Tue 9/907:05ONT - GLA
2 stops17h 05mDelta
Deal found 19/8£491
Sat 4/1006:00GLA - ONT
2 stops21h 15mMultiple Airlines
Sat 11/1011:48ONT - GLA
2 stops20h 22mMultiple Airlines
Deal found 20/8£549
Sun 31/820:25GLA - ONT
2 stops33h 14mBritish Airways
Mon 8/914:54ONT - GLA
2 stops24h 31mBritish Airways
Deal found 19/8£550
Sun 31/806:00GLA - ONT
2 stops24h 40mDelta
Mon 8/907:05ONT - GLA
2 stops17h 05mDelta
Deal found 19/8£554
Sat 27/905:50GLA - ONT
2 stops44h 22mBritish Airways
Tue 7/1016:49ONT - GLA
2 stops21h 11mBritish Airways
Deal found 22/8£559
Sat 30/819:45GLA - ONT
2 stops33h 54mBritish Airways
Mon 8/916:45ONT - GLA
2 stops21h 40mBritish Airways
Deal found 19/8£580
Sun 31/820:25GLA - ONT
2 stops33h 14mBritish Airways
Thu 11/916:45ONT - GLA
2 stops21h 40mBritish Airways
Deal found 19/8£628
Tue 30/921:20GLA - ONT
2 stops33h 13mIberia
Tue 24/310:57ONT - GLA
2 stops22h 58mIberia
Deal found 20/8£639
Wed 3/913:30GLA - ONT
2 stops34h 38mDelta
Wed 10/913:15ONT - GLA
2 stops34h 55mDelta
Deal found 19/8£655
Sat 30/819:45GLA - ONT
2 stops33h 54mBritish Airways
Thu 11/916:45ONT - GLA
2 stops21h 40mBritish Airways
Deal found 19/8£658
Tue 2/908:45GLA - ONT
2 stops42h 09mIberia
Sun 7/914:30ONT - GLA
2 stops48h 55mIberia
Deal found 19/8£676

Cheapflights Fare Finder

 
Customise your flight search to find flights from Glasgow Intl to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 22 August 2025.
Use the filters below to find and compare flights from Glasgow Intl Airport to Ontario that are best for you.

Fly from

Glasgow Intl

Fly to

Ontario

Route

Depart

Return

Price

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Tue 2/9

06:00-16:08

2 stops18h 08m

Ontario

Wed 10/9

07:05-08:10

2 stops17h 05m

£489

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 1/9

06:00-22:40

2 stops24h 40m

Ontario

Tue 9/9

07:05-08:10

2 stops17h 05m

£491

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Sat 4/10

06:00-19:15

2 stops21h 15m

Ontario

Sat 11/10

11:48-16:10

2 stops20h 22m

£549

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 1/9

11:35-21:39

2 stops18h 04m

Ontario

Mon 8/9

12:45-23:25

2 stops26h 40m

£550

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Wed 3/9

05:50-22:33

2 stops24h 43m

Ontario

Mon 8/9

10:53-23:25

2 stops28h 32m

£550

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Tue 2/9

20:25-18:54

2 stops30h 29m

Ontario

Mon 8/9

10:53-23:25

2 stops28h 32m

£550

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Tue 2/9

06:00-22:40

2 stops24h 40m

Ontario

Mon 8/9

13:15-08:10

2 stops34h 55m

£554

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Sat 27/9

05:50-18:12

2 stops44h 22m

Ontario

Tue 7/10

16:49-22:00

2 stops21h 11m

£559

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Tue 2/9

20:25-18:16

2 stops29h 51m

Ontario

Thu 11/9

16:45-22:25

2 stops21h 40m

£628

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 1/9

11:35-21:39

2 stops18h 04m

Ontario

Thu 11/9

16:45-22:25

2 stops21h 40m

£628

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 24 results
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2
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Best time to book a flight from Glasgow Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Glasgow Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Glasgow Intl Airport to Ontario

What is the cheapest month to book a flight from Glasgow Intl Airport to Ontario?

Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Ontario (average of £516). Flying from Glasgow Intl Airport to Ontario in August is currently the most expensive (average of £827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 22 August 2025.
See what other customers who have flown with British Airways from Glasgow Intl Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,292 reviews
Check prices

Overall

6.7

Crew

7.6

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Food

6.3

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.
British Airways
6.7
Okay
7,292 reviews
British Airways
6.7
Okay
7,292 reviews
Check prices

Overall

6.7

Crew

7.6

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Food

6.3

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

Related info for your journey

Find useful and relevant information for your journey from Glasgow Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Glasgow Intl?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Glasgow Intl. On average, Ontario has 0 inbound flights from Glasgow Intl per day from 1 airline. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Glasgow Intl Airport to Ontario?

    Departing from Glasgow Intl Airport to Ontario will take you 18h 04m. There are 5088 mi between Glasgow Intl Airport and Ontario. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Glasgow Intl Airport to Ontario round-trip?

    According to our current data, British Airways (£436), offers the cheapest pricing from Glasgow Intl Airport to Ontario.

  • What are the cheapest airlines to fly from Glasgow Intl Airport to Ontario one-way?

    One-way options have recently been found by users for as low as £540 on British Airways. Other airlines that offer cheap prices include Iberia from £684 and Virgin Atlantic from £899 one-way.

  • Can I find deals for flights from Glasgow Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on Glasgow Intl to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Glasgow Intl to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Ontario.

  • Can I find deals for business class flights from Glasgow Intl to Ontario?

    Yes. Cheapflights offers flight deals from Glasgow Intl to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Glasgow Intl Airport to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Ontario (average of £516). Flying from Glasgow Intl Airport to Ontario in August is currently the most expensive (average of £827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Glasgow Intl to Ontario

Discover the top airline that operate flights from Glasgow Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 22 August 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£436Average£481FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Glasgow Intl to Ontario?

Cheapflights helps you search for flights from Glasgow Intl to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Glasgow Intl to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Glasgow Intl to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Glasgow Intl to Ontario with no change fees?

Yes, we can. To see specific flights from Glasgow Intl to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Glasgow Intl to Ontario become cheaper?

Of course! You can now track prices for flights from Glasgow Intl to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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