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Cheap flights from Ontario to Guam from $1,346

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Guam departing on 10/2. 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

United Airlines Logo
1:53 pm - 3:55 pmONT-GUM
57h 02m2 stops
United Airlines Logo
7:10 am - 5:23 pmGUM-ONT
27h 13m2 stops
$1,346United Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
United Airlines Logo
1:53 pm - 3:55 pmONT-GUM
57h 02m2 stops
United Airlines Logo
7:10 am - 8:24 pmGUM-ONT
30h 14m2 stops
$1,443United Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
United Airlines Logo
6:36 pm - 3:55 pmONT-GUM
52h 19m2 stops
United Airlines Logo
7:10 am - 5:23 pmGUM-ONT
27h 13m2 stops
$1,478United Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:37 pmGUM-ONT
17h 37m2 stops
$1,895United Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
United Airlines Logo
6:00 am - 7:00 pmONT-GUM
19h 00m2 stops
United Airlines Logo
7:25 am - 9:59 amGUM-ONT
20h 34m2 stops
$1,917United Airlines
Find Deal
Mon, Dec 29 - Mon, Jan 19
United Airlines Logo
6:31 pm - 6:05 pmONT-GUM
54h 34m2 stops
United Airlines Logo
7:15 am - 5:37 pmGUM-ONT
27h 22m2 stops
$1,939United Airlines
Find Deal
Sun, Aug 17 - Thu, Aug 21
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:17 pmGUM-ONT
17h 17m2 stops
$1,945United Airlines
Find Deal
Thu, Nov 20 - Mon, Dec 15
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:25 am - 9:59 amGUM-ONT
20h 34m2 stops
$1,967United Airlines
Find Deal
Thu, Jan 15 - Sat, Jan 31
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:17 pmGUM-ONT
17h 17m2 stops
$1,995United Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
United Airlines Logo
6:00 am - 7:00 pmONT-GUM
19h 00m2 stops
United Airlines Logo
7:25 am - 9:59 amGUM-ONT
20h 34m2 stops
$2,097United Airlines
Find Deal
Thu, Dec 18 - Fri, Jan 16

United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets
United Airlines
Oct 2
ONT1:53 pmOntario
57h 02m
2 stops
GUM3:55 pmTamuning Guam Intl
Oct 6
GUM7:10 amTamuning Guam Intl
27h 13m
2 stops
ONT5:23 pmOntario
$1,346
Find similar
United Airlines
Oct 2
ONT1:53 pmOntario
57h 02m
2 stops
GUM3:55 pmTamuning Guam Intl
Oct 6
GUM7:10 amTamuning Guam Intl
30h 14m
2 stops
ONT8:24 pmOntario
$1,443
Find similar
United Airlines
Oct 2
ONT6:36 pmOntario
52h 19m
2 stops
GUM3:55 pmTamuning Guam Intl
Oct 6
GUM7:10 amTamuning Guam Intl
27h 13m
2 stops
ONT5:23 pmOntario
$1,478
Find similar

Delta flights from Ontario to Guam

Our best Delta deals on Ontario to Guam flight tickets
Delta
Aug 9
ONT6:00 amOntario
25h 10m
2 stops
GUM12:10 amTamuning Guam Intl
Aug 24
GUM5:00 pmTamuning Guam Intl
46h 42m
2 stops
ONT10:42 pmOntario
$2,678
Find similar
Delta
Aug 9
ONT6:00 amOntario
25h 10m
2 stops
GUM12:10 amTamuning Guam Intl
Aug 23
GUM1:55 amTamuning Guam Intl
38h 45m
2 stops
ONT11:40 pmOntario
$2,728
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 July 31, 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

Thu 10/2

1:53 pm-3:55 pm

2 stops57h 02m

Tamuning Guam Intl

Mon 10/6

7:10 am-5:23 pm

2 stops27h 13m

$1,346

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 10/2

1:53 pm-3:55 pm

2 stops57h 02m

Tamuning Guam Intl

Mon 10/6

7:10 am-8:24 pm

2 stops30h 14m

$1,443

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 10/2

6:36 pm-3:55 pm

2 stops52h 19m

Tamuning Guam Intl

Mon 10/6

7:10 am-5:23 pm

2 stops27h 13m

$1,478

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Wed 11/12

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Wed 11/19

1:00 pm-12:37 pm

2 stops17h 37m

$1,895

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 12/29

6:00 am-7:00 pm

2 stops19h 00m

Tamuning Guam Intl

Mon 1/19

7:25 am-9:59 am

2 stops20h 34m

$1,917

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 8/17

6:31 pm-6:05 pm

2 stops54h 34m

Tamuning Guam Intl

Thu 8/21

7:15 am-5:37 pm

2 stops27h 22m

$1,939

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 11/20

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Mon 12/15

1:00 pm-12:17 pm

2 stops17h 17m

$1,945

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 1/15

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 1/31

7:25 am-9:59 am

2 stops20h 34m

$1,967

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 12/5

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

Fri 12/12

1:00 pm-12:17 pm

2 stops17h 17m

$1,995

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 12/18

6:00 am-7:00 pm

2 stops19h 00m

Tamuning Guam Intl

Fri 1/16

7:25 am-9:59 am

2 stops20h 34m

$2,097

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Guam from

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

Best Price Found

$1,656

Fastest flight time

18h 50m

Direct flights

None

Airports in Guam

1 airport
The best one-way flight to Guam from Ontario in the past 72 hours is $1,656. The best round-trip flight deal from Ontario to Guam found on momondo in the last 72 hours is $1,346.
The fastest flight from Ontario to Guam takes 18h 50m
There are no direct flights from Ontario to Guam. Popular non-direct route for this connection is Ontario Airport - Tamuning Guam Intl Airport.
There is 1 airport near Guam: Tamuning Guam Intl (GUM)
Search flight deals

  • 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 $997Free CancellationRating
7.4
8,900 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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Popular cities in Guam

Popular flights according to clicks in the last 7 days on momondo
Flights to Tamuningfrom $788