Which airports can I use when flying from Tamuning to Ontario?

Flights from Tamuning to Ontario usually depart from Tamuning Guam Intl (GUM) and arrive at Ontario (ONT).

Can I save money by using flexible dates for flights from Tamuning to Ontario?

On the Tamuning to Ontario route, being flexible with your departure day can save you up to 20%. Sunday is the cheapest day at $1,391 round-trip on average, while Thursday is the most expensive at $1,732: a $341 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

What popular places can I visit in Ontario?

Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Do I need a passport to fly from Tamuning to Ontario?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Tamuning to Ontario changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,378 to $3,280. That means the highest observed fare was about 2x higher than the lowest one.

How are flight prices from Tamuning to Ontario looking right now?

One-way fares from Tamuning to Ontario are currently in line with typical prices for this route. Average one-way fares are about $1,390.

What is the time difference between Tamuning and Ontario?

Ontario is 17 hours behind Tamuning (Pacific Time vs Chamorro Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Ontario Airport (ONT)?

Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include: · Fox · Thrifty · Europcar · Dollar · Alamo

How much should I expect to pay for a Tamuning to Ontario flight?

Round-trip flights from Tamuning to Ontario range from $1,508 to $1,732, with an average of $1,732 over the past 12 months. Anything below $1,508 counts as a good deal.

What is the cheapest airline to fly from Tamuning to Ontario?

United Airlines ($1,378) offered the cheapest round-trip ticket from Tamuning to Ontario in the last 5 days.

$1,378 CHEAP FLIGHTS from Tamuning to Ontario (GUM - ONT)

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Cheapest round-trip

$1,378

Typical prices: $1,508-$1,732

United Airlines

Sat 10/20Mon 11/19

GUM - ONT • 2 stops

Cheapest one-way

$1,390

Typical prices: $1,400-$1,400

United Airlines

Fri 9/21

GUM - ONT • 2 stops

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We hope you love your trip to Ontario!

Flight Deals

Cheap Flights from Tamuning to Ontario (GUM-ONT)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Tamuning to Ontario

Tue, Oct 20 - Thu, Nov 19

7:15 am - 5:41 pmGUM Tamuning Guam Intl-ONT Ontario

27h 26m2 stops Osaka Kansai Intl San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$1,378United Airlines

Tue, Sep 22 - Tue, Sep 29

7:10 am - 8:01 pmGUM Tamuning Guam Intl-ONT Ontario

29h 51m2 stops Honolulu San Francisco

8:03 am - 4:20 amONT Ontario-GUM Tamuning Guam Intl

27h 17m2 stops San Francisco Tokyo Haneda

$1,383United Airlines

Fri, Jan 1 - Fri, Jan 15

7:45 am - 12:42 pmGUM Tamuning Guam Intl-ONT Ontario

22h 57m2 stops Honolulu Denver Intl

1:33 pm - 4:40 amONT Ontario-GUM Tamuning Guam Intl

45h 07m2 stops San Francisco Tokyo Haneda

$1,583United Airlines

Sun, Dec 20 - Wed, Jan 6

4:55 pm - 10:53 pmGUM Tamuning Guam Intl-ONT Ontario

47h 58m2 stops Tokyo Narita San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$1,592United Airlines

Mon, Oct 19 - Mon, Nov 16

7:15 am - 3:22 pmGUM Tamuning Guam Intl-ONT Ontario

25h 07m2 stops Osaka Kansai Intl San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$3,274United Airlines

Mon, Oct 19 - Thu, Nov 19

7:15 am - 3:22 pmGUM Tamuning Guam Intl-ONT Ontario

25h 07m2 stops Osaka Kansai Intl San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$3,274United Airlines

Mon, Oct 19 - Tue, Nov 17

7:15 am - 3:22 pmGUM Tamuning Guam Intl-ONT Ontario

25h 07m2 stops Osaka Kansai Intl San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$3,274United Airlines

Mon, Oct 19 - Wed, Nov 18

7:15 am - 3:22 pmGUM Tamuning Guam Intl-ONT Ontario

25h 07m2 stops Osaka Kansai Intl San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$3,274United Airlines

Thu, Oct 22 - Thu, Nov 19

12:15 pm - 3:22 pmGUM Tamuning Guam Intl-ONT Ontario

20h 07m2 stops Tokyo Narita San Francisco

6:00 am - 7:00 pmONT Ontario-GUM Tamuning Guam Intl

19h 00m2 stops San Francisco Honolulu

$3,280United Airlines

Booking Insights

Price, demand and travel trends for Tamuning to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Tamuning to Ontario with more confidence.

Prices

Airlines

How much is a round-trip flight from Tamuning to Ontario?

Round-trip flights from Tamuning to Ontario start at $1,378. Prices are below average for this route right now, with typical round-trip fares ranging from $1,508 to $1,732. The lowest price found in the past 5 days was $1,378 on United Airlines.

Find deals

Cheapest flight	$1,378

Flight from Tamuning to Ontario

When to book flights from Tamuning to Ontario

Are your dates flexible? Find out the best times to travel from Tamuning to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Tamuning to Ontario?
Flights from Tamuning to Ontario usually depart from Tamuning Guam Intl (GUM) and arrive at Ontario (ONT).
Can I save money by using flexible dates for flights from Tamuning to Ontario?
On the Tamuning to Ontario route, being flexible with your departure day can save you up to 20%. Sunday is the cheapest day at $1,391 round-trip on average, while Thursday is the most expensive at $1,732: a $341 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.
What popular places can I visit in Ontario?
Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.
Do I need a passport to fly from Tamuning to Ontario?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Tamuning to Ontario changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,378 to $3,280. That means the highest observed fare was about 2x higher than the lowest one.
How are flight prices from Tamuning to Ontario looking right now?
One-way fares from Tamuning to Ontario are currently in line with typical prices for this route. Average one-way fares are about $1,390.
What is the time difference between Tamuning and Ontario?
Ontario is 17 hours behind Tamuning (Pacific Time vs Chamorro Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Ontario Airport (ONT)?
Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
· Fox
· Thrifty
· Europcar
· Dollar
· Alamo
How much should I expect to pay for a Tamuning to Ontario flight?
Round-trip flights from Tamuning to Ontario range from $1,508 to $1,732, with an average of $1,732 over the past 12 months. Anything below $1,508 counts as a good deal.

If your dates can be flexible, aim for a Sunday departure instead of Thursday. On this route, Sunday flights average $1,391 - about $341 less than Thursday (20% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
- Azure Hotel & Suites, Trademark Collection by Wyndham
- La Quinta Inn & Suites by Wyndham Ontario Airport
- Holiday Inn Ontario Airport By IHG

Everything you need to know for your flight from Tamuning to Ontario

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Tamuning (GUM)

Ontario (ONT)

GUM - ONT

$1,378 Find Cheap Flights from Tamuning to Ontario - Compare and Save

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Cheap Flights from Tamuning to Ontario (GUM-ONT)

Recent round-trip flight deals from Tamuning to Ontario

Recent one-way flight deals from Tamuning to Ontario

Price, demand and travel trends for Tamuning to Ontario flights

How much is a round-trip flight from Tamuning to Ontario?

What is the cheapest airline to fly from Tamuning to Ontario?

Key details for Tamuning to Ontario flights

Cheapest flight

When to book flights from Tamuning to Ontario

Your Tamuning to Ontario flight questions, answered

Your guide to booking Tamuning to Ontario flights

Everything you need to know for your flight from Tamuning to Ontario

Information on your arrival and departure airports

Cabin class types available on flights from Tamuning to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights to and from Tamuning and Ontario

Flights to other popular destinations

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Choose which airport to fly into in Ontario