Cheap flights from Ontario (ONT) to Guam

ONT — GUM
Sep 27 — Oct 41

How far in advance should I book a flight from Ontario to Guam?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 31% on flights from Ontario to Guam compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $2,078. For sooner than that we have options available in the next 3 days from $2,490.

What is the cheapest month to fly from Ontario to Guam?

Our data shows that February tends to be the cheapest month to fly to Guam from Ontario. Users have commonly found prices around $1,783 for the month, but tickets can be as low as $859. Due to multiple factors, prepare for potentially higher prices in December.

When is the cheapest time to fly from Ontario to Guam (ONT - GU)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Guam as you normally would.

Cheap flights from Ontario to Guam in September, October 2022

The best prices found for ONT to Guam flights for September, October
Oct 13 - Oct 16
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

41h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

34h 30m
$970

United Airlines

Pick Dates

Deal found 9/21/22

Sep 30 - Oct 5
ONT

Ontario

GUM

Tamuning Guam Intl

3 stops

53h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

3 stops

52h 47m
$1,659

Multiple Airlines

Pick Dates

Deal found 9/22/22

Oct 11 - Oct 19
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

19h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

18h 50m
$1,861

United Airlines

Pick Dates

Deal found 9/21/22

Ontario to Guam 2022 flight deals

Cheap flights to Guam from Ontario found for this year
Nov 10 - Nov 13
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

37h 55m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

20h 32m
$951

United Airlines

Pick Dates

Deal found 9/22/22

Oct 13 - Oct 16
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

41h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

34h 30m
$970

United Airlines

Pick Dates

Deal found 9/21/22

Sep 30 - Oct 5
ONT

Ontario

GUM

Tamuning Guam Intl

3 stops

53h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

3 stops

52h 47m
$1,659

Multiple Airlines

Pick Dates

Deal found 9/22/22

Cheap United Airlines flights from Ontario to Guam

Nov 10 - Nov 13
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

37h 55m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

20h 32m
$951

United Airlines

Pick Dates

Deal found 9/22/22

Oct 13 - Oct 16
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

41h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

34h 30m
$970

United Airlines

Pick Dates

Deal found 9/21/22

Feb 15 - Mar 2
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

20h 45m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

20h 08m
$1,786

United Airlines

Pick Dates

Deal found 9/21/22

Cheap Delta flights from Ontario to Guam

Oct 16 - Oct 23
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

40h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

46h 26m
$1,946

Delta

Pick Dates

Deal found 9/21/22

Oct 18 - Oct 25
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

58h 25m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

46h 26m
$2,422

Delta

Pick Dates

Deal found 9/21/22

Last minute flights from Ontario to Guam

Late deals on return flights to Guam from Ontario, departing today and this week
Sep 30 - Oct 5
ONT

Ontario

GUM

Tamuning Guam Intl

3 stops

53h 00m
GUM

Tamuning Guam Intl

ONT

Ontario

3 stops

52h 47m
$1,659

Multiple Airlines

Pick Dates

Deal found 9/22/22

Sep 27 - Oct 6
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

37h 30m
GUM

Tamuning Guam Intl

ONT

Ontario

2 stops

20h 15m
$2,305

Multiple Airlines

Pick Dates

Deal found 9/22/22

One-way flights to Guam from Ontario

The cheapest one-way flights from Ontario to Guam
Sep 27
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

37h 30m
$919

Hawaiian Airlines

Pick Dates

Deal found 9/20/22

Sep 28
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

19h 00m
$1,454

United Airlines

Pick Dates

Deal found 9/21/22

Dec 3
ONT

Ontario

GUM

Tamuning Guam Intl

2 stops

20h 45m
$1,472

United Airlines

Pick Dates

Deal found 9/22/22

Related info for your journey

Useful info, stats and facts about Ontario to Guam flights.

What airport do you fly from for flights from Ontario to Guam?

Most people fly from Ontario (ONT) if they book a flight from Ontario to Guam. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

Which airlines flying from Ontario to Guam have flexible changes due to COVID-19?

United Airlines is one of the carriers that may have flexible change policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Ontario to Guam for under $1,000 on Cheapflights?

Yes, there are multiple flights from Ontario to Guam for under $1,000. The cheapest flight booked recently is on United Airlines for just $951, but on average you can expect to pay $2,384.

Are there last-minute flights available from Ontario to Guam for under $1,700?

There are currently 2+ open flights from Ontario to Guam within the next 7 days for less than $1,700.

What are the cheapest flights from Ontario to Guam?

Looking at all options, your cheapest flight can be booked for $2,230. While the most popular route (Ontario - Tamuning Guam Intl) can be booked for $970 on average our data indicates $2,628 when flying from Ontario to Guam.

Top airline flying from Ontario to Guam

The chart below displays the airlines Cheapflights users traveling from Ontario to Guam choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
United AirlinesCheapest$1,275Average$2,130FlexibilityNo cancel feeOn-time69%COVID-19 safety
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