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

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

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

Prices for flights from Guam to Ontario Airport are updated daily.

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

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

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Guam to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$1,378 Cheap Flights from Guam to Ontario in 2025

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Find the cheapest flights from Guam to Los Angeles

Round-trip

One-way

Recent round-trip flight deals from Guam to Los Angeles

7:20 am - 12:13 pmGUM-ONT

45h 53m2 stops

1:53 pm - 6:05 pmONT-GUM

35h 12m2 stops

$1,378United Airlines

Find Deal

mié., sep. 17 - mar., sep. 30

7:20 am - 5:37 pmGUM-ONT

27h 17m2 stops

6:50 pm - 6:05 pmONT-GUM

54h 15m2 stops

$1,455United Airlines

Find Deal

jue., sep. 18 - dom., sep. 21

1:55 am - 8:57 amGUM-ONT

48h 02m2 stops

1:15 pm - 3:15 pmONT-GUM

57h 00m2 stops

$1,735Delta

Find Deal

mié., sep. 17 - dom., sep. 21

United Airlines flights from Guam to Ontario

Our best United Airlines deals on Guam to Ontario flight tickets

United Airlines

Sep 17

GUM7:20 amTamuning Guam Intl

45h 53m

2 stops

ONT12:13 pmOntario

Sep 30

ONT1:53 pmOntario

35h 12m

2 stops

GUM6:05 pmTamuning Guam Intl

$1,378

Find similar

United Airlines

Sep 18

GUM7:20 amTamuning Guam Intl

27h 17m

2 stops

ONT5:37 pmOntario

Sep 21

ONT6:50 pmOntario

54h 15m

2 stops

GUM6:05 pmTamuning Guam Intl

$1,455

Find similar

United Airlines

Jul 16

GUM7:15 amTamuning Guam Intl

27h 28m

2 stops

ONT5:43 pmOntario

Jul 30

ONT6:10 amOntario

18h 55m

2 stops

GUM6:05 pmTamuning Guam Intl

$2,053

Find similar

How to get the cheapest flight ticket from Guam to Ontario

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 Ontario?

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $1,390. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Guam to Ontario for around $2,005.

Cheap Guam to Ontario flight deals and tips

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

Best Price Found	$1,390
Fastest flight time	27h 17m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Guam in the past 72 hours is $1,390. The best round-trip flight deal from Guam to Ontario found on momondo in the last 72 hours is $1,378.

The fastest flight from Guam to Ontario takes 27h 17m

There are no direct flights from Guam to Ontario. Popular non-direct route for this connection is Tamuning Guam Intl Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

When did momondo last update prices for flights from Guam to Ontario Airport?
Prices for flights from Guam to Ontario Airport are updated daily.
How many operators does momondo search for flights from Guam to Ontario Airport?
As of July 2025, there is 1 operator available to choose from for flights from Guam to Ontario Airport.
How old do you have to be to fly from Guam to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Guam to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Guam to Ontario

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $1,392	Free Cancellation	Rating 7.4 8,846 reviews		Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Guam to Ontario 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 Ontario that suits you.

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

Flights from Guam to Ontario 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 Guam to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Guam to Ontario.

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

If you are not ready to book a flight from Guam to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.