Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Guam from $1,521

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Guam departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Guam

Cheap round-trip flights

United Airlines Logo
1:15 pm - 6:05 pmONT-GUM
59h 50m2 stops
United Airlines Logo
7:20 am - 5:40 pmGUM-ONT
27h 20m2 stops
$1,521United Airlines
Find Deal
dom., sep. 28 - jue., oct. 2
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:17 pmGUM-ONT
17h 17m2 stops
$1,895United Airlines
Find Deal
mar., nov. 25 - jue., dic. 4
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 5:34 pmGUM-ONT
27h 54m2 stops
$1,917United Airlines
Find Deal
mié., nov. 19 - sáb., nov. 29
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:20 pm - 12:14 pmGUM-ONT
34h 54m2 stops
$1,942United Airlines
Find Deal
mié., ene. 14 - mar., ene. 20
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:18 pmGUM-ONT
17h 18m2 stops
$1,995United Airlines
Find Deal
sáb., dic. 6 - sáb., dic. 13
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 9:59 amGUM-ONT
20h 19m2 stops
$2,017United Airlines
Find Deal
sáb., dic. 6 - sáb., dic. 27
Delta Logo
6:00 am - 3:15 pmONT-GUM
40h 15m2 stops
Delta Logo
1:55 am - 10:41 pmGUM-ONT
37h 46m2 stops
$2,115Delta
Find Deal
jue., oct. 2 - dom., oct. 5
United Airlines Logo
5:00 am - 5:50 pmONT-GUM
42h 50m2 stops
United Airlines Logo
5:00 pm - 12:37 pmGUM-ONT
37h 37m2 stops
$2,235United Airlines
Find Deal
dom., nov. 2 - dom., nov. 9
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:17 pmGUM-ONT
17h 17m2 stops
$2,255United Airlines
Find Deal
lun., dic. 8 - vie., dic. 12
United Airlines Logo
6:00 am - 7:00 pmONT-GUM
19h 00m2 stops
United Airlines Logo
7:40 am - 10:01 amGUM-ONT
20h 21m2 stops
$2,307United Airlines
Find Deal
mié., dic. 24 - mar., dic. 30

United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets
United Airlines
Sep 28
ONT1:15 pmOntario
59h 50m
2 stops
GUM6:05 pmTamuning Guam Intl
Oct 2
GUM7:20 amTamuning Guam Intl
27h 20m
2 stops
ONT5:40 pmOntario
$1,521
Find similar
United Airlines
Nov 25
ONT6:00 amOntario
18h 50m
2 stops
GUM6:50 pmTamuning Guam Intl
Dec 4
GUM1:00 pmTamuning Guam Intl
17h 17m
2 stops
ONT12:17 pmOntario
$1,895
Find similar
United Airlines
Nov 19
ONT6:00 amOntario
18h 50m
2 stops
GUM6:50 pmTamuning Guam Intl
Nov 29
GUM7:40 amTamuning Guam Intl
27h 54m
2 stops
ONT5:34 pmOntario
$1,917
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Guam that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated septiembre 18, 2025.
Use the filters below to find and compare flights from Ontario to Guam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

dom. 9/28

1:15 pm-6:05 pm

2 stops59h 50m

Tamuning Guam Intl

jue. 10/2

7:20 am-5:40 pm

2 stops27h 20m

$1,521

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mar. 11/25

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

jue. 12/4

1:00 pm-12:17 pm

2 stops17h 17m

$1,895

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mié. 11/19

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

sáb. 11/29

7:40 am-5:34 pm

2 stops27h 54m

$1,917

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mié. 1/14

6:00 am-7:05 pm

2 stops19h 05m

Tamuning Guam Intl

mar. 1/20

7:20 pm-12:14 pm

2 stops34h 54m

$1,942

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

sáb. 12/6

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

sáb. 12/13

1:00 pm-12:18 pm

2 stops17h 18m

$1,995

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

sáb. 12/6

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

sáb. 12/27

7:40 am-9:59 am

2 stops20h 19m

$2,017

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

jue. 10/2

6:00 am-3:15 pm

2 stops40h 15m

Tamuning Guam Intl

dom. 10/5

1:55 am-10:41 pm

2 stops37h 46m

$2,115

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

dom. 11/2

5:00 am-5:50 pm

2 stops42h 50m

Tamuning Guam Intl

dom. 11/9

5:00 pm-12:37 pm

2 stops37h 37m

$2,235

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

lun. 12/8

6:00 am-6:50 pm

2 stops18h 50m

Tamuning Guam Intl

vie. 12/12

1:00 pm-12:17 pm

2 stops17h 17m

$2,255

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

mié. 12/24

6:00 am-7:00 pm

2 stops19h 00m

Tamuning Guam Intl

mar. 12/30

7:40 am-10:01 am

2 stops20h 21m

$2,307

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Guam from

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

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

Direct flights

None
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?

  • 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 AirlinesPriceFrom $1,866Free CancellationRating
7.4
8,926 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
sáb. 10/18
sáb. 10/25
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Guam

Popular cities in Guam

Popular flights according to clicks in the last 7 days on momondo
Flights to Tamuningfrom $711