HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Guam

$1,967+ Cheap flights from Ontario (ONT) to Guam

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GUM
abr. 27 — may. 41
dom. 4/27
dom. 5/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Guam 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 Guam

Keep the following information in mind while searching for Ontario to Guam flight deals. Data was last updated abril 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,967
(United Airlines)

Popular in

August

Cheapest in

February

Average price

$1,888
Provider with most accurate pricing for Los Angeles-Tamuning Guam Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Tamuning Guam Intl flights.
Search Deals
From Ontario to Guam
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Ontario to Guam

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

This United Airlines deal was found by Cheapflights users on 4/22. 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.
mié. 7/166:10 amONT - GUM
2 stops18h 55mUnited Airlines
mié. 7/307:00 amGUM - ONT
2 stops22h 32mUnited Airlines
Deal found 4/22$1,967

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Guam 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 abril 22, 2025.
Use the filters below to find and compare flights from Ontario to Guam that are best for you.

Fly from

Ontario

Fly to

Guam

Route

Depart

Return

Price

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mié. 7/16

6:10 am-6:05 pm

2 stops18h 55m

Tamuning Guam Intl

mié. 7/30

7:00 am-12:32 pm

2 stops22h 32m

$1,967

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Best time to book a flight from Ontario to Guam

Have a flexible travel schedule? Discover the best time to fly to Guam 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 Guam

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Guam (average of $1,977). Flying from Ontario to Guam 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.

Rainfall in Guam by month

Plan your trip to Guam by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Guam ranges from 2.6 - 14.4 inches per month. August is typically the wettest month, when rainfall can reach 14.4 in. March is typically the driest time to visit Guam when rainfall is around 2.6 in.

Temperature in Guam by month

Plan your trip to Guam by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Guam, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

Reviews of airlines servicing Guam

Get insights into the airlines that provide service to Guam. 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 Guam. Reviews last updated abril 22, 2025.
United Airlines
7.4
Good
8,683 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,683 reviews
United Airlines
7.4
Good
8,683 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Ontario to Guam. 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 from for flights from Ontario to Guam?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Guam. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Guam (average of $1,977). Flying from Ontario to Guam 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.

Alternative routes for Ontario to Guam

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sydney flights
Los Angeles to Papeete flights
Los Angeles to Melbourne flights
Los Angeles to Auckland flights
San Francisco to Sydney flights
Los Angeles to Brisbane flights
San Francisco to Auckland flights
San Francisco to Melbourne flights
Ontario to Sydney flights
San Francisco to Papeete flights
Los Angeles to Nadi flights
Santa Ana to Sydney flights
San Francisco to Brisbane flights
Los Angeles to Avalon flights
San Francisco to Nadi flights
Ontario to Papeete flights
Burbank to Sydney flights
Ontario to Auckland flights
San Jose to Papeete flights
Santa Ana to Auckland flights
Los Angeles to Vaitape flights
San Jose to Sydney flights
Ontario to Melbourne flights
Ontario to Brisbane flights
Oakland to Sydney flights
San Francisco to Avalon flights
Santa Ana to Nadi flights
Ontario to Nadi flights
Santa Ana to Brisbane flights
Los Angeles to Perth flights
San Diego to Sydney flights
San Jose to Melbourne flights
San Diego to Papeete flights
Los Angeles to Christchurch flights
Santa Ana to Melbourne flights
Las Vegas to Sydney flights
San Diego to Melbourne flights
San Jose to Auckland flights
San Francisco to Vaitape flights
San Francisco to Christchurch flights
Los Angeles to Adelaide flights
Las Vegas to Melbourne flights
Los Angeles to Apia flights
Los Angeles to Cairns flights
San Francisco to Tamuning flights
Los Angeles to Rarotonga flights
San Diego to Auckland flights
Los Angeles to Tamuning flights
San Francisco to Perth flights

Top airline flying from Ontario to Guam

Discover the top airline that operate flights from Ontario to Guam. 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 abril 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,866Average$2,096FlexibilityNo 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.