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Cheap flights from Ontario to Guam from $556

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Guam departing on 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Guam

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:25 am - 12:43 pmGUM-ONT
22h 18m2 stops
$1,868United Airlines
Find Deal
Tue, Feb 10 - Tue, Mar 10
Delta Logo
6:00 am - 11:05 pmONT-GUM
23h 05m2 stops
Delta Logo
1:00 am - 10:47 pmGUM-ONT
39h 47m2 stops
$1,889Delta
Find Deal
Thu, Dec 4 - Tue, Dec 16
United Airlines Logo
6:00 am - 6:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:05 am - 5:47 pmGUM-ONT
27h 42m2 stops
$2,178United Airlines
Find Deal
Thu, Apr 30 - Mon, May 4
United Airlines Logo
6:00 am - 6:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
12:25 pm - 5:47 pmGUM-ONT
46h 22m3 stops
$2,227United Airlines
Find Deal
Thu, Apr 30 - Mon, May 4
United Airlines Logo
6:00 am - 6:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:05 am - 12:20 pmGUM-ONT
22h 15m2 stops
$2,228United Airlines
Find Deal
Mon, Apr 20 - Fri, Apr 24
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:17 pmGUM-ONT
22h 37m2 stops
$2,242United Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 17
United Airlines Logo
6:00 am - 7:00 pmONT-GUM
19h 00m2 stops
United Airlines Logo
7:25 am - 12:43 pmGUM-ONT
22h 18m2 stops
$2,243United Airlines
Find Deal
Thu, Dec 18 - Tue, Mar 17
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:18 pmGUM-ONT
22h 38m2 stops
$2,278United Airlines
Find Deal
Sun, Dec 7 - Fri, Dec 12
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 10:01 amGUM-ONT
20h 21m2 stops
$2,308United Airlines
Find Deal
Tue, Dec 16 - Tue, Dec 30
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:17 pmGUM-ONT
22h 37m2 stops
$2,378United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9

United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets
United Airlines
Feb 10
ONT6:00 amOntario
19h 05m
2 stops
GUM7:05 pmTamuning Guam Intl
Mar 10
GUM7:25 amTamuning Guam Intl
22h 18m
2 stops
ONT12:43 pmOntario
$1,868
Find similar
United Airlines
Apr 30
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
May 4
GUM7:05 amTamuning Guam Intl
27h 42m
2 stops
ONT5:47 pmOntario
$2,178
Find similar
United Airlines
Apr 30
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
May 4
GUM12:25 pmTamuning Guam Intl
46h 22m
3 stops
ONT5:47 pmOntario
$2,227
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 5, 2025.
Use the filters below to find and compare flights from Ontario to Guam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 2/10

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Tue 3/10

7:25 am-12:43 pm

2 stops22h 18m

$1,868

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 12/4

6:00 am-11:05 pm

2 stops23h 05m

Tamuning Guam Intl

Tue 12/16

1:00 am-10:47 pm

2 stops39h 47m

$1,889

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 4/30

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Mon 5/4

7:05 am-5:47 pm

2 stops27h 42m

$2,178

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 4/30

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Mon 5/4

12:25 pm-5:47 pm

3 stops46h 22m

$2,227

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 4/20

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Fri 4/24

7:05 am-12:20 pm

2 stops22h 15m

$2,228

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 12/4

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Wed 12/17

7:40 am-12:17 pm

2 stops22h 37m

$2,242

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 12/18

6:00 am-7:00 pm

2 stops19h 00m

Tamuning Guam Intl

Tue 3/17

7:25 am-12:43 pm

2 stops22h 18m

$2,243

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 12/7

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Fri 12/12

7:40 am-12:18 pm

2 stops22h 38m

$2,278

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 12/16

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Tue 12/30

7:40 am-10:01 am

2 stops20h 21m

$2,308

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 12/2

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Tue 12/9

7:40 am-12:17 pm

2 stops22h 37m

$2,378

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Ontario to Guam

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Guam?

The cheapest day to depart from Ontario to Guam is on a Monday when prices can be found for as low as $1,879. Flights from Ontario to Guam on a Friday will generally be more expensive and average around $2,516. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Cheap Ontario to Guam flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Guam

Direct flights

None
There are no direct flights from Ontario to Guam. There are no popular flight routes from Ontario to Guam.
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  • When did momondo last update prices for flights from Ontario Airport to Guam?

    Prices for flights from Ontario Airport to Guam were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Guam?

  • How old do you have to be to fly from Ontario Airport to Guam?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Guam.

  • What documentation or ID do you need to fly to Guam?

    The necessary travel and health documents for your Guam trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Guam

Compare and see reviews for airlines that fly from Ontario to Guam with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $1,867Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Guam?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Guam for you.

Can I find flights from Ontario to Guam with flexible booking policies on momondo?

Yes. All flights to Guam from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Guam?

momondo helps you find the best flight between Ontario and Guam by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Guam right now. Can momondo alert me if prices change?

Price alerts on flights to Guam from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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