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Cheap flights from Ontario to Guam from $1,657

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 Guam departing on 2/16. 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

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Find the cheapest flights from Ontario to Guam

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:00 am - 11:55 pm
ONT
-
GUM
23h 55m
2 stops
Delta Logo
3:00 am - 10:19 pm
GUM
-
ONT
36h 19m
2 stops
$1,754Delta
Wed, May 6 - Wed, May 27
Delta Logo
1:25 pm - 11:55 pm
ONT
-
GUM
41h 30m
2 stops
Delta Logo
5:00 pm - 11:34 pm
GUM
-
ONT
47h 34m
2 stops
$1,763Delta
Sun, May 10 - Mon, May 25
Delta Logo
6:00 am - 11:55 pm
ONT
-
GUM
24h 55m
2 stops
Delta Logo
3:00 am - 11:34 pm
GUM
-
ONT
37h 34m
2 stops
$1,804Delta
Fri, May 8 - Mon, May 25
Delta Logo
1:25 pm - 3:15 pm
ONT
-
GUM
56h 50m
2 stops
Delta Logo
3:00 am - 5:10 pm
GUM
-
ONT
31h 10m
2 stops
$1,813Delta
Sun, May 10 - Fri, May 22
Delta Logo
6:00 am - 3:15 pm
ONT
-
GUM
40h 15m
2 stops
Delta Logo
5:00 pm - 5:10 pm
GUM
-
ONT
41h 10m
2 stops
$1,854Delta
Fri, May 8 - Fri, May 22
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:05 am - 9:41 am
GUM
-
ONT
19h 36m
2 stops
$1,919United Airlines
Mon, Apr 27 - Sat, May 9
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:05 am - 12:20 pm
GUM
-
ONT
22h 15m
2 stops
$2,069United Airlines
Fri, Jul 10 - Fri, Jul 17
United Airlines Logo
6:15 am - 6:50 pm
ONT
-
GUM
19h 35m
2 stops
United Airlines Logo
7:25 am - 12:48 pm
GUM
-
ONT
22h 23m
2 stops
$2,279United Airlines
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
6:09 am - 7:05 pm
ONT
-
GUM
18h 56m
2 stops
United Airlines Logo
7:25 am - 12:18 pm
GUM
-
ONT
21h 53m
2 stops
$2,429United Airlines
Sun, Mar 1 - Tue, Mar 17
United Airlines Logo
6:10 am - 7:05 pm
ONT
-
GUM
18h 55m
2 stops
United Airlines Logo
12:30 pm - 12:47 pm
GUM
-
ONT
18h 17m
2 stops
$2,456United Airlines
Mon, Feb 16 - Sat, Feb 28

Delta flights from Ontario to Guam

Our best Delta deals on Ontario to Guam flight tickets
Delta
May 6
ONT7:00 amOntario
39h 15m
2 stops
GUM3:15 pmTamuning Guam Intl
May 24
GUM3:00 amTamuning Guam Intl
31h 10m
2 stops
ONT5:10 pmOntario
$1,754
Delta
May 10
ONT9:50 amOntario
45h 05m
2 stops
GUM11:55 pmTamuning Guam Intl
May 26
GUM3:00 amTamuning Guam Intl
31h 10m
2 stops
ONT5:10 pmOntario
$1,763
Delta
May 8
ONT6:00 amOntario
40h 15m
2 stops
GUM3:15 pmTamuning Guam Intl
May 24
GUM5:00 pmTamuning Guam Intl
46h 19m
2 stops
ONT10:19 pmOntario
$1,804

United Airlines flights from Ontario to Guam

Our best United Airlines deals on Ontario to Guam flight tickets
United Airlines
Apr 27
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
May 9
GUM7:05 amTamuning Guam Intl
19h 36m
2 stops
ONT9:41 amOntario
$1,919
United Airlines
Jul 10
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
Jul 17
GUM7:05 amTamuning Guam Intl
22h 15m
2 stops
ONT12:20 pmOntario
$2,069
United Airlines
Mar 8
ONT6:15 amOntario
19h 35m
2 stops
GUM6:50 pmTamuning Guam Intl
Mar 15
GUM7:25 amTamuning Guam Intl
22h 23m
2 stops
ONT12:48 pmOntario
$2,279

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 February 4, 2026.
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

Wed 5/6

7:00 am-11:55 pm

2 stops23h 55m

Tamuning Guam Intl

Wed 5/27

3:00 am-10:19 pm

2 stops36h 19m

$1,754

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 5/10

1:25 pm-11:55 pm

2 stops41h 30m

Tamuning Guam Intl

Mon 5/25

5:00 pm-11:34 pm

2 stops47h 34m

$1,763

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 5/8

6:00 am-11:55 pm

2 stops24h 55m

Tamuning Guam Intl

Mon 5/25

3:00 am-11:34 pm

2 stops37h 34m

$1,804

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 5/10

1:25 pm-3:15 pm

2 stops56h 50m

Tamuning Guam Intl

Fri 5/22

3:00 am-5:10 pm

2 stops31h 10m

$1,813

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 5/8

6:00 am-3:15 pm

2 stops40h 15m

Tamuning Guam Intl

Fri 5/22

5:00 pm-5:10 pm

2 stops41h 10m

$1,854

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 4/27

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 5/9

7:05 am-9:41 am

2 stops19h 36m

$1,919

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 7/10

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Fri 7/17

7:05 am-12:20 pm

2 stops22h 15m

$2,069

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 3/8

6:15 am-6:50 pm

2 stops19h 35m

Tamuning Guam Intl

Sun 3/15

7:25 am-12:48 pm

2 stops22h 23m

$2,279

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 3/1

6:09 am-7:05 pm

2 stops18h 56m

Tamuning Guam Intl

Tue 3/17

7:25 am-12:18 pm

2 stops21h 53m

$2,429

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 2/16

6:10 am-7:05 pm

2 stops18h 55m

Tamuning Guam Intl

Sat 2/28

12:30 pm-12:47 pm

2 stops18h 17m

$2,456

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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 airline that flies from Ontario to Guam?

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

Cheap Ontario to Guam flight deals and tips

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

Fastest flight time

18h 55m

Direct flights

None
The fastest flight from Ontario to Guam takes 18h 55m
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 $1,867Free CancellationRating
7.4
9,236 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.

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