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Cheap flights from Ontario to Tamuning from $1,428

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 Tamuning departing on 9/21. 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 Tamuning

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:05 am - 6:05 pm
ONT
-
GUM
19h 00m
2 stops
United Airlines Logo
7:25 am - 12:33 pm
GUM
-
ONT
22h 08m
2 stops
$1,919United Airlines
Thu, Oct 22 - Fri, Oct 30
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:10 am - 12:12 pm
GUM
-
ONT
22h 02m
2 stops
$1,969United Airlines
Tue, Aug 25 - Tue, Sep 8
United Airlines Logo
6:00 am - 3:50 pm
ONT
-
GUM
40h 50m
2 stops
United Airlines Logo
7:30 pm - 10:50 pm
GUM
-
ONT
44h 20m
2 stops
$2,106United Airlines
Fri, Jul 10 - Fri, Jul 17
United Airlines Logo
6:05 am - 6:05 pm
ONT
-
GUM
19h 00m
2 stops
United Airlines Logo
7:10 am - 12:12 pm
GUM
-
ONT
22h 02m
2 stops
$2,179United Airlines
Thu, Oct 8 - Tue, Oct 13
United Airlines Logo
9:01 am - 9:45 pm
ONT
-
GUM
19h 44m
2 stops
United Airlines Logo
7:10 am - 12:12 pm
GUM
-
ONT
22h 02m
2 stops
$2,215United Airlines
Sat, Sep 5 - Sat, Oct 3
United Airlines Logo
6:00 am - 6:50 pm
ONT
-
GUM
19h 50m
2 stops
United Airlines Logo
7:25 am - 12:20 pm
GUM
-
ONT
21h 55m
2 stops
$2,229United Airlines
Mon, Oct 26 - Fri, Oct 30
United Airlines Logo
1:50 pm - 6:05 pm
ONT
-
GUM
35h 15m
2 stops
United Airlines Logo
7:30 pm - 10:37 pm
GUM
-
ONT
44h 07m
2 stops
$2,348United Airlines
Sun, Jun 21 - Sun, Jun 28
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:05 am - 12:50 pm
GUM
-
ONT
22h 45m
2 stops
$2,409United Airlines
Sun, Aug 16 - Sun, Aug 23
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
12:15 pm - 3:29 pm
GUM
-
ONT
20h 14m
2 stops
$2,435United Airlines
Sun, Jun 28 - Sat, Jul 11
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:05 am - 12:12 pm
GUM
-
ONT
22h 07m
3 stops
$2,728United Airlines
Sun, Jun 21 - Sun, Jun 28

United Airlines flights from Ontario to Tamuning

Our best United Airlines deals on Ontario to Tamuning flight tickets
United Airlines
Aug 25
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
Sep 8
GUM7:10 amTamuning Guam Intl
22h 02m
2 stops
ONT12:12 pmOntario
$1,969
United Airlines
Jul 10
ONT6:00 amOntario
40h 50m
2 stops
GUM3:50 pmTamuning Guam Intl
Jul 17
GUM7:30 pmTamuning Guam Intl
44h 20m
2 stops
ONT10:50 pmOntario
$2,106
United Airlines
Sep 5
ONT9:01 amOntario
19h 44m
2 stops
GUM9:45 pmTamuning Guam Intl
Oct 3
GUM7:10 amTamuning Guam Intl
22h 02m
2 stops
ONT12:12 pmOntario
$2,215

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Tamuning 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 May 9, 2026.
Use the filters below to find and compare flights from Ontario to Tamuning that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 10/22

6:05 am-6:05 pm

2 stops19h 00m

Tamuning Guam Intl

Fri 10/30

7:25 am-12:33 pm

2 stops22h 08m

$1,919

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 8/25

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Tue 9/8

7:10 am-12:12 pm

2 stops22h 02m

$1,969

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 7/10

6:00 am-3:50 pm

2 stops40h 50m

Tamuning Guam Intl

Fri 7/17

7:30 pm-10:50 pm

2 stops44h 20m

$2,106

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 10/8

6:05 am-6:05 pm

2 stops19h 00m

Tamuning Guam Intl

Tue 10/13

7:10 am-12:12 pm

2 stops22h 02m

$2,179

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 9/5

9:01 am-9:45 pm

2 stops19h 44m

Tamuning Guam Intl

Sat 10/3

7:10 am-12:12 pm

2 stops22h 02m

$2,215

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Mon 10/26

6:00 am-6:50 pm

2 stops19h 50m

Tamuning Guam Intl

Fri 10/30

7:25 am-12:20 pm

2 stops21h 55m

$2,229

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 6/21

1:50 pm-6:05 pm

2 stops35h 15m

Tamuning Guam Intl

Sun 6/28

7:30 pm-10:37 pm

2 stops44h 07m

$2,348

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 8/16

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sun 8/23

7:05 am-12:50 pm

2 stops22h 45m

$2,409
Quickest round-trip

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 6/28

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sat 7/11

12:15 pm-3:29 pm

2 stops20h 14m

$2,435

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sun 6/21

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Sun 6/28

7:05 am-12:12 pm

3 stops22h 07m

$2,728

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Tamuning from

How to get the cheapest flight ticket from Ontario to Tamuning

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 Tamuning Guam Intl?

Delta and United Airlines are the most popular carriers operating from Ontario to Tamuning Guam Intl

When to book flights from Ontario to Tamuning

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Tamuning according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Tamuning (ONT to GUM) flight deals and tips

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

Fastest flight time

19h 05m

Direct flights

None
The fastest flight from Ontario to Tamuning takes 19h 05m
There are no direct flights from Ontario to Tamuning. There are no popular flight routes from Ontario to Tamuning.
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Frequently asked questions about flying from Ontario to Tamuning

  • How far is Ontario to Tamuning Guam Intl by plane?

    Ontario and Tamuning Guam Intl are 6117.0 mi apart from one another. Typically, this will take 19h 05m by plane in normal conditions.

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

    Prices for flights from Ontario Airport to Tamuning Guam Intl Airport were last updated today.

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

    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 Tamuning Guam Intl Airport.

  • What documentation or ID do you need to fly to Tamuning Guam Intl Airport?

    The necessary travel and health documents for your Tamuning Guam Intl Airport 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.

Why use momondo?

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

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

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

Flights from Ontario to Tamuning 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 Ontario to Tamuning?

Once you have performed a search for Ontario to Tamuning flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Tamuning 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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