What is the cheapest airline that flies from Ontario to Guam?

United Airlines is the most popular carrier operating from Ontario to Guam

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?

As of December 2025, there is 1 operator available to choose from 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.

$1,656 Cheap Flights from Ontario to Guam in 2025/26

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Find the cheapest flights from Ontario to Guam

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:53 pm - 3:40 pm

ONT

GUM

55h 47m2 stops

7:40 am - 12:43 pm

GUM

ONT

23h 03m2 stops

$1,664United Airlines

Sat, Feb 28 - Wed, Mar 4

7:30 am - 2:35 pm

ONT

GUM

37h 05m2 stops

1:00 am - 11:49 pm

GUM

ONT

40h 49m2 stops

$1,753Delta

Tue, Feb 17 - Mon, Feb 23

6:00 am - 6:05 pm

ONT

GUM

19h 05m2 stops

7:05 am - 9:55 am

GUM

ONT

19h 50m2 stops

$1,868United Airlines

Mon, Apr 6 - Mon, Apr 13

6:09 am - 7:05 pm

ONT

GUM

18h 56m2 stops

7:25 am - 12:48 pm

GUM

ONT

22h 23m2 stops

$1,968United Airlines

Sun, Mar 1 - Sun, Mar 15

6:00 am - 6:50 pm

ONT

GUM

19h 50m2 stops

7:25 am - 12:49 pm

GUM

ONT

22h 24m2 stops

$2,178United Airlines

Thu, Mar 19 - Tue, Mar 24

6:00 am - 6:05 pm

ONT

GUM

19h 05m2 stops

7:05 am - 12:38 pm

GUM

ONT

22h 33m2 stops

$2,228United Airlines

Mon, Apr 6 - Fri, Apr 10

6:00 am - 7:05 pm

ONT

GUM

19h 05m2 stops

12:30 pm - 12:47 pm

GUM

ONT

18h 17m2 stops

$2,304United Airlines

Sat, Feb 7 - Sat, Feb 14

6:00 am - 7:05 pm

ONT

GUM

19h 05m2 stops

12:30 pm - 12:17 pm

GUM

ONT

17h 47m2 stops

$3,619United Airlines

Mon, Jan 19 - Sat, Jan 24

United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets

United Airlines

Feb 28

ONT1:53 pmOntario

55h 47m

2 stops

GUM3:40 pmTamuning Guam Intl

Mar 4

GUM7:40 amTamuning Guam Intl

23h 03m

2 stops

ONT12:43 pmOntario

$1,664

Find similar

United Airlines

Apr 6

ONT6:00 amOntario

19h 05m

2 stops

GUM6:05 pmTamuning Guam Intl

Apr 13

GUM7:05 amTamuning Guam Intl

19h 50m

2 stops

ONT9:55 amOntario

$1,868

Find similar

United Airlines

Mar 1

ONT6:09 amOntario

18h 56m

2 stops

GUM7:05 pmTamuning Guam Intl

Mar 15

GUM7:25 amTamuning Guam Intl

22h 23m

2 stops

ONT12:48 pmOntario

$1,968

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 2/28

1:53 pm-3:40 pm

2 stops55h 47m

Tamuning Guam Intl

Wed 3/4

7:40 am-12:43 pm

2 stops23h 03m

$1,664

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 2/17

7:30 am-2:35 pm

2 stops37h 05m

Tamuning Guam Intl

Mon 2/23

1:00 am-11:49 pm

2 stops40h 49m

$1,753

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 4/6

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Mon 4/13

7:05 am-9:55 am

2 stops19h 50m

$1,868

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 3/1

6:09 am-7:05 pm

2 stops18h 56m

Tamuning Guam Intl

Sun 3/15

7:25 am-12:48 pm

2 stops22h 23m

$1,968

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 3/19

6:00 am-6:50 pm

2 stops19h 50m

Tamuning Guam Intl

Tue 3/24

7:25 am-12:49 pm

2 stops22h 24m

$2,178

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 4/6

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Fri 4/10

7:05 am-12:38 pm

2 stops22h 33m

$2,228

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 2/7

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 2/14

12:30 pm-12:47 pm

2 stops18h 17m

$2,304

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 1/19

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 1/24

12:30 pm-12:17 pm

2 stops17h 47m

$3,619

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 12/15

6:00 am-6:50 pm

2 stops18h 50m

$1,656

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Wed 1/14

1:53 pm-7:05 pm

2 stops35h 12m

$1,679

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

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

Fastest flight time	18h 50m
Direct flights	None

The fastest flight from Ontario to Guam takes 18h 50m

There are no direct flights from Ontario to Guam. There are no popular flight routes from Ontario to Guam.

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?
As of December 2025, there is 1 operator available to choose from 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 Airlines	PriceFrom $1,867	Free Cancellation	Rating 7.4 9,095 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.

An easier way to manage your Guam trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Flights to Tamuningfrom $739

Cheap flights from Ontario to Guam from $1,656

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 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Ontario to Guam

Cheap round-trip flights

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United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets

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Use the filters below to find and compare flights from Ontario to Guam that are best for you.

See travel insights to Guam from

How to get the cheapest flight ticket from Ontario to Guam

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

What is the cheapest airline that flies from Ontario to Guam?

United Airlines is the most popular carrier operating from Ontario to Guam

Cheap Ontario to Guam flight deals and tips

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

Fastest flight time

Direct flights

When did momondo last update prices for flights from Ontario Airport to Guam?

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?

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

Best airlines flying from Ontario to Guam

Compare and see reviews for airlines that fly from Ontario to Guam with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Guam trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Guam

Popular cities in Guam

Popular flights according to clicks in the last 7 days on momondo