HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Tamuning

$1,199+ Cheap flights from Ontario (ONT) to Tamuning (GUM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GUM
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Tamuning with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Tamuning

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Tamuning (GUM). 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 julio 29, 2025.

Round-trip from

$1,349
(United Airlines)

One-way from

$1,199
(Vakatrip)

Popular in

December

Cheapest in

October

Average price

$2,016
From Ontario to Tamuning Guam Intl
Search Deals
One-way flight from Ontario to Tamuning Guam Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($94 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Ontario to Tamuning

Cheapest flights from Ontario to Tamuning
Explore the most affordable flight options available from Ontario to Tamuning. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 29, 2025.

This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/29:36 amONT - GUM
2 stops61h 19mUnited Airlines
lun. 10/67:10 amGUM - ONT
2 stops30h 14mUnited Airlines
Deal found 7/27$1,349
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/46:00 amONT - GUM
2 stops25h 10mDelta
dom. 11/24:50 pmGUM - ONT
2 stops42h 20mDelta
Deal found 7/27$1,903

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Tamuning 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 2,558,603 searches. Data last updated julio 29, 2025.
Use the filters below to find and compare flights from Ontario to Tamuning that are best for you.

Fly from

Ontario

Fly to

Tamuning

Route

Depart

Return

Price

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

jue. 10/2

9:36 am-3:55 pm

2 stops61h 19m

Tamuning Guam Intl

lun. 10/6

7:10 am-8:24 pm

2 stops30h 14m

$1,349

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

jue. 9/4

6:00 am-12:10 am

2 stops25h 10m

Tamuning Guam Intl

dom. 11/2

4:50 pm-6:10 pm

2 stops42h 20m

$1,903

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

jue. 10/16

6:00 am-2:40 pm

2 stops39h 40m

$1,199

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

lun. 10/13

6:37 am-3:15 pm

2 stops39h 38m

$1,435

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mar. 9/9

6:00 am-6:05 pm

2 stops19h 05m

$1,656

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Ontario to Tamuning

Have a flexible travel schedule? Discover the best time to fly to Tamuning from Ontario with our price prediction graph.
Estimated round-trip 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 Ontario to Tamuning

What is the cheapest month to book a flight from Ontario to Tamuning?

Currently, January is the cheapest month in which you can book a flight from Ontario to Tamuning (average of $1,977). Flying from Ontario to Tamuning in May is currently the most expensive (average of $2,214). 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 Tamuning

Get insights into the airlines that provide service to Tamuning. 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 Tamuning. Reviews last updated julio 29, 2025.
Get a feel of what it's like to fly with Delta and United Airlines from Ontario to Tamuning by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What are the cheapest airlines flying from Ontario to Tamuning round-trip?

    United Airlines, at $1,349, was found to be the cheapest airline from Ontario to Tamuning. An alternate airline flying to your destination would be Delta. United Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

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

    Yes. In addition to deals on Ontario to Tamuning flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Tamuning?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Tamuning 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 Ontario to Tamuning?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Tamuning (average of $1,977). Flying from Ontario to Tamuning in May is currently the most expensive (average of $2,214). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ontario to Tamuning

Discover the top airline that operate flights from Ontario to Tamuning. 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 2,558,603 searches. Data last updated julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$997Average$2,016FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.