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

Delta and United Airlines are the most popular carriers operating from Ontario to Tamuning Guam Intl

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

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

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

As of December 2025, there is 1 operator available to choose from for flights from Ontario Airport to Tamuning Guam Intl Airport.

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

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 Tamuning Guam Intl Airport.

What documentation or ID do you need to fly to Tamuning Guam Intl Airport?

The necessary travel and health documents for your Tamuning Guam Intl Airport 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.

$621 Cheap Flights from Ontario to Tamuning in 2025/26

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Find the cheapest flights from Ontario to Tamuning

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1:53 pm - 3:40 pm

ONT

GUM

55h 47m2 stops

7:40 am - 8:50 pm

GUM

ONT

31h 10m2 stops

$1,206United Airlines

Sat, Feb 28 - Wed, Mar 4

7:30 am - 11:05 pm

ONT

GUM

21h 35m2 stops

1:00 am - 11:49 pm

GUM

ONT

40h 49m2 stops

$1,753Delta

Tue, Feb 17 - Mon, Feb 23

7:30 am - 11:05 pm

ONT

GUM

21h 35m2 stops

1:00 am - 10:44 pm

GUM

ONT

39h 44m2 stops

$1,837Delta

Mon, Jan 19 - Sun, Feb 1

6:00 am - 6:50 pm

ONT

GUM

19h 50m2 stops

7:25 am - 12:48 pm

GUM

ONT

22h 23m2 stops

$1,868United Airlines

Mon, Mar 16 - Thu, Mar 26

6:10 am - 4:20 am

ONT

GUM

28h 10m3 stops

7:40 am - 12:38 pm

GUM

ONT

22h 58m2 stops

$1,892United Airlines

Tue, Feb 17 - Tue, Feb 24

7:30 am - 11:05 pm

ONT

GUM

21h 35m2 stops

1:00 am - 10:51 pm

GUM

ONT

39h 51m2 stops

$1,953Delta

Fri, Jan 23 - Fri, Jan 30

6:10 am - 7:05 pm

ONT

GUM

18h 55m2 stops

7:40 am - 12:38 pm

GUM

ONT

22h 58m2 stops

$2,178United Airlines

Mon, Feb 23 - Thu, Feb 26

6:00 am - 7:05 pm

ONT

GUM

19h 05m2 stops

7:40 am - 11:18 am

GUM

ONT

21h 38m2 stops

$2,228United Airlines

Mon, Feb 2 - Fri, Feb 6

6:00 am - 7:05 pm

ONT

GUM

19h 05m2 stops

7:40 am - 11:18 am

GUM

ONT

21h 38m2 stops

$2,243United Airlines

Thu, Jan 15 - Mon, Jan 19

6:00 am - 7:05 pm

ONT

GUM

19h 05m2 stops

7:40 am - 12:17 pm

GUM

ONT

22h 37m2 stops

$2,278United Airlines

Sat, Jan 31 - Sat, Feb 7

Delta flights from Ontario to Tamuning

Our best Delta deals on Ontario to Tamuning flight tickets

Delta

Feb 17

ONT7:30 amOntario

21h 35m

2 stops

GUM11:05 pmTamuning Guam Intl

Feb 23

GUM1:00 amTamuning Guam Intl

39h 37m

2 stops

ONT10:37 pmOntario

$1,753

Find similar

Delta

Jan 19

ONT7:30 amOntario

21h 35m

2 stops

GUM11:05 pmTamuning Guam Intl

Feb 1

GUM1:00 amTamuning Guam Intl

39h 44m

2 stops

ONT10:44 pmOntario

$1,837

Find similar

Delta

Jan 23

ONT7:30 amOntario

21h 35m

2 stops

GUM11:05 pmTamuning Guam Intl

Jan 30

GUM1:00 amTamuning Guam Intl

39h 51m

2 stops

ONT10:51 pmOntario

$1,953

Find similar

United Airlines flights from Ontario to Tamuning

Our best United Airlines deals on Ontario to Tamuning 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

31h 10m

2 stops

ONT8:50 pmOntario

$1,206

Find similar

United Airlines

Mar 16

ONT6:00 amOntario

19h 50m

2 stops

GUM6:50 pmTamuning Guam Intl

Mar 26

GUM7:25 amTamuning Guam Intl

22h 23m

2 stops

ONT12:48 pmOntario

$1,868

Find similar

United Airlines

Feb 17

ONT6:10 amOntario

28h 10m

3 stops

GUM4:20 amTamuning Guam Intl

Feb 24

GUM7:40 amTamuning Guam Intl

22h 58m

2 stops

ONT12:38 pmOntario

$1,892

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-8:50 pm

2 stops31h 10m

$1,206

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 2/17

7:30 am-11:05 pm

2 stops21h 35m

Tamuning Guam Intl

Mon 2/23

1:00 am-11:49 pm

2 stops40h 49m

$1,753

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 1/19

7:30 am-11:05 pm

2 stops21h 35m

Tamuning Guam Intl

Sun 2/1

1:00 am-10:44 pm

2 stops39h 44m

$1,837

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 3/16

6:00 am-6:50 pm

2 stops19h 50m

Tamuning Guam Intl

Thu 3/26

7:25 am-12:48 pm

2 stops22h 23m

$1,868

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 2/17

6:10 am-4:20 am

3 stops28h 10m

Tamuning Guam Intl

Tue 2/24

7:40 am-12:38 pm

2 stops22h 58m

$1,892

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 1/23

7:30 am-11:05 pm

2 stops21h 35m

Tamuning Guam Intl

Fri 1/30

1:00 am-10:51 pm

2 stops39h 51m

$1,953

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 2/23

6:10 am-7:05 pm

2 stops18h 55m

Tamuning Guam Intl

Thu 2/26

7:40 am-12:38 pm

2 stops22h 58m

$2,178

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 2/2

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Fri 2/6

7:40 am-11:18 am

2 stops21h 38m

$2,228

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 1/15

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Mon 1/19

7:40 am-11:18 am

2 stops21h 38m

$2,243

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 1/31

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 2/7

7:40 am-12:17 pm

2 stops22h 37m

$2,278

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Tamuning

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 Tamuning?

The cheapest day to depart from Ontario to Tamuning is on a Wednesday. Travelers who choose to depart for Tamuning on a Wednesday will often find tickets for as low as $1,866. The most expensive day to fly to Tamuning is Saturday, with ticket prices averaging around $2,067.

What is the cheapest time of day to depart on your flight to Tamuning?

Our most recent data shows that the best time of day to fly to Tamuning is at noon. Flights from Ontario to Tamuning during this time can be as low as $672. Flights in the morning are often more expensive with an average ticket price of $1,985.

When to book flights from Ontario to Tamuning

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Tamuning according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Tamuning (ONT to GUM) flight deals and tips

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

Fastest flight time	18h 50m
Direct flights	None

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

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

Search flight deals

How far is Ontario to Tamuning Guam Intl by plane?
Ontario and Tamuning Guam Intl are 6117.0 mi apart from one another. Typically, this will take 18h 55m by plane in normal conditions.
When did momondo last update prices for flights from Ontario Airport to Tamuning Guam Intl Airport?
Prices for flights from Ontario Airport to Tamuning Guam Intl Airport were last updated today.
How many operators does momondo search for flights from Ontario Airport to Tamuning Guam Intl Airport?
As of December 2025, there is 1 operator available to choose from for flights from Ontario Airport to Tamuning Guam Intl Airport.
How old do you have to be to fly from Ontario Airport to Tamuning Guam Intl Airport?
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 Tamuning Guam Intl Airport.
What documentation or ID do you need to fly to Tamuning Guam Intl Airport?
The necessary travel and health documents for your Tamuning Guam Intl Airport 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.
What is the most popular airline from Ontario to Tamuning?
momondo data reveals that the most frequently booked airline on the route from Ontario to Tamuning is United Airlines, representing 100% of all bookings.

Best airlines flying from Ontario to Tamuning

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $1,867	Free Cancellation	Rating 7.4 9,089 reviews		Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Ontario to Tamuning flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Tamuning that suits you.

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

Flights from Ontario to Tamuning with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Ontario to Tamuning flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Tamuning 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 Tamuning 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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Cheap flights from Ontario to Tamuning from $621

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 Tamuning departing on 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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 Tamuning

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Delta flights from Ontario to Tamuning

Our best Delta deals on Ontario to Tamuning flight tickets

United Airlines flights from Ontario to Tamuning

Our best United Airlines deals on Ontario to Tamuning flight tickets

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

See travel insights to Tamuning from

How to get the cheapest flight ticket from Ontario to Tamuning

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 Tamuning?

The cheapest day to depart from Ontario to Tamuning is on a Wednesday. Travelers who choose to depart for Tamuning on a Wednesday will often find tickets for as low as $1,866. The most expensive day to fly to Tamuning is Saturday, with ticket prices averaging around $2,067.

What is the cheapest time of day to depart on your flight to Tamuning?

Our most recent data shows that the best time of day to fly to Tamuning is at noon. Flights from Ontario to Tamuning during this time can be as low as $672. Flights in the morning are often more expensive with an average ticket price of $1,985.

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

Delta and United Airlines are the most popular carriers operating from Ontario to Tamuning Guam Intl

When to book flights from Ontario to Tamuning

Cheap Ontario to Tamuning (ONT to GUM) flight deals and tips

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

Fastest flight time

Direct flights

How far is Ontario to Tamuning Guam Intl by plane?

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

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

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

What documentation or ID do you need to fly to Tamuning Guam Intl Airport?

What is the most popular airline from Ontario to Tamuning?

Best airlines flying from Ontario to Tamuning

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

Why use momondo?

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

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

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

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

An easier way to manage your Tamuning 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

Fly your favorite airline to Tamuning

Airlines are sorted and displayed according to clicks in the past 7 days on momondo