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Cheap flights from Ontario to Tamuning from $1,427

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 4/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Delta Logo
6:45 am - 11:55 pm
ONT
-
GUM
24h 10m
2 stops
Delta Logo
3:00 am - 5:10 pm
GUM
-
ONT
31h 10m
2 stops
$1,853Delta
Thu, May 7 - Wed, May 20
Delta Logo
6:45 am - 11:55 pm
ONT
-
GUM
24h 10m
2 stops
Delta Logo
3:00 am - 5:05 pm
GUM
-
ONT
31h 05m
2 stops
$1,903Delta
Thu, May 7 - Fri, May 15
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:30 pm - 5:56 pm
GUM
-
ONT
39h 26m
2 stops
$1,942United Airlines
Thu, May 28 - Wed, Jun 3
Delta Logo
7:00 am - 11:55 pm
ONT
-
GUM
23h 55m
2 stops
Delta Logo
3:00 am - 5:05 pm
GUM
-
ONT
31h 05m
2 stops
$1,953Delta
Sat, May 2 - Fri, May 15
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
2 stops
$1,969United Airlines
Tue, Jul 14 - Tue, Jul 21
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
2 stops
$2,019United Airlines
Fri, Jun 5 - Thu, Jun 25
United Airlines Logo
8:00 am - 4:20 am
ONT
-
GUM
27h 20m
2 stops
United Airlines Logo
7:35 pm - 10:58 pm
GUM
-
ONT
44h 23m
2 stops
$2,058United Airlines
Fri, Sep 11 - Thu, Sep 17
United Airlines Logo
6:30 pm - 6:05 pm
ONT
-
GUM
54h 35m
2 stops
United Airlines Logo
7:30 pm - 5:56 pm
GUM
-
ONT
39h 26m
2 stops
$2,092United Airlines
Fri, Jun 12 - Sun, Jun 21
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
2 stops
$2,139United Airlines
Wed, Jun 17 - Thu, Jun 25
Delta Logo
6:45 am - 11:55 pm
ONT
-
GUM
24h 10m
2 stops
Delta Logo
3:00 am - 10:34 pm
GUM
-
ONT
36h 34m
2 stops
$2,153Delta
Sat, May 9 - Thu, May 14

United Airlines flights from Ontario to Tamuning

Our best United Airlines deals on Ontario to Tamuning flight tickets
United Airlines
May 28
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
Jun 3
GUM7:30 pmTamuning Guam Intl
39h 26m
2 stops
ONT5:56 pmOntario
$1,942
United Airlines
Jul 14
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
Jul 21
GUM7:05 amTamuning Guam Intl
22h 07m
2 stops
ONT12:12 pmOntario
$1,969
United Airlines
Jun 5
ONT6:00 amOntario
19h 05m
2 stops
GUM6:05 pmTamuning Guam Intl
Jun 25
GUM7:05 amTamuning Guam Intl
22h 07m
2 stops
ONT12:12 pmOntario
$2,019

Delta flights from Ontario to Tamuning

Our best Delta deals on Ontario to Tamuning flight tickets
Delta
May 7
ONT6:45 amOntario
24h 10m
2 stops
GUM11:55 pmTamuning Guam Intl
May 20
GUM3:00 amTamuning Guam Intl
31h 10m
2 stops
ONT5:10 pmOntario
$1,853
Delta
May 7
ONT6:45 amOntario
24h 10m
2 stops
GUM11:55 pmTamuning Guam Intl
May 15
GUM3:00 amTamuning Guam Intl
31h 05m
2 stops
ONT5:05 pmOntario
$1,903
Delta
May 2
ONT7:00 amOntario
23h 55m
2 stops
GUM11:55 pmTamuning Guam Intl
May 15
GUM3:00 amTamuning Guam Intl
31h 05m
2 stops
ONT5:05 pmOntario
$1,953

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 March 22, 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 5/7

6:45 am-11:55 pm

2 stops24h 10m

Tamuning Guam Intl

Wed 5/20

3:00 am-5:10 pm

2 stops31h 10m

$1,853

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 5/7

6:45 am-11:55 pm

2 stops24h 10m

Tamuning Guam Intl

Fri 5/15

3:00 am-5:05 pm

2 stops31h 05m

$1,903

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Thu 5/28

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Wed 6/3

7:30 pm-5:56 pm

2 stops39h 26m

$1,942

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 5/2

7:00 am-11:55 pm

2 stops23h 55m

Tamuning Guam Intl

Fri 5/15

3:00 am-5:05 pm

2 stops31h 05m

$1,953
Quickest round-trip

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Tue 7/14

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Tue 7/21

7:05 am-12:12 pm

2 stops22h 07m

$1,969

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 6/5

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Thu 6/25

7:05 am-12:12 pm

2 stops22h 07m

$2,019

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 9/11

8:00 am-4:20 am

2 stops27h 20m

Tamuning Guam Intl

Thu 9/17

7:35 pm-10:58 pm

2 stops44h 23m

$2,058

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Fri 6/12

6:30 pm-6:05 pm

2 stops54h 35m

Tamuning Guam Intl

Sun 6/21

7:30 pm-5:56 pm

2 stops39h 26m

$2,092

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Wed 6/17

6:00 am-6:05 pm

2 stops19h 05m

Tamuning Guam Intl

Thu 6/25

7:05 am-12:12 pm

2 stops22h 07m

$2,139

OntarioTamuning

ONT - GUM

ONTGUM

Ontario

Sat 5/9

6:45 am-11:55 pm

2 stops24h 10m

Tamuning Guam Intl

Thu 5/14

3:00 am-10:34 pm

2 stops36h 34m

$2,153

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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.
Search flight deals

  • 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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