$1,427 Find Cheap Flights from Ontario to Guam

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Guam departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Flight Deals

Book Cheap Ontario to Guam Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Guam that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Guam

Thu, Dec 4 - Wed, Dec 10
Delta Logo
6:00 am - 2:35 pmONT-GUM
38h 35m2 stops
Delta Logo
1:00 am - 10:47 pmGUM-ONT
39h 47m2 stops
$1,853Delta
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Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:40 am - 12:38 pmGUM-ONT
22h 58m2 stops
$1,868United Airlines
Find Deal
Fri, Feb 13 - Sun, Feb 22
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:40 am - 12:38 pmGUM-ONT
22h 58m2 stops
$1,968United Airlines
Find Deal
Fri, Jan 16 - Sat, Jan 24
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
12:30 pm - 12:14 pmGUM-ONT
17h 44m2 stops
$1,995United Airlines
Find Deal
Wed, Nov 19 - Wed, Nov 26
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:33 pmGUM-ONT
22h 53m2 stops
$2,178United Airlines
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Sun, Dec 21 - Fri, Jan 2
United Airlines Logo
5:05 am - 7:00 pmONT-GUM
43h 55m2 stops
United Airlines Logo
7:40 am - 9:07 pmGUM-ONT
31h 27m2 stops
$2,210United Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 30
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:33 pmGUM-ONT
22h 53m2 stops
$2,228United Airlines
Find Deal
Sun, Nov 23 - Sun, Nov 30
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:33 pmGUM-ONT
22h 53m2 stops
$2,278United Airlines
Find Deal
Mon, Nov 3 - Thu, Dec 4
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:40 am - 12:32 pmGUM-ONT
22h 52m2 stops
$2,378United Airlines
Find Deal
Mon, Nov 17 - Sun, Nov 23
Delta Logo
6:00 am - 11:05 pmONT-GUM
23h 05m2 stops
Delta Logo
1:00 am - 10:55 pmGUM-ONT
39h 55m2 stops
$11,323Delta
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to Guam flights

Get data-powered insights and trends into flights from Ontario to Guam to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Guam?

The average price of all round-trip flights from Ontario to Guam clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Guam on a Monday and more expensive on a Friday. On your return trip to Ontario, you should consider flying back on a Thursday, and avoid Wednesdays for better deals.

Good to know

Cheapest flight$1,427
Flight from Ontario to Tamuning

FAQs - booking Guam flights

  • How does KAYAK find such low prices on flights from Ontario to Guam?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Guam.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Guam?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Guam is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Guam?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Guam with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Guam?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Guam up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Guam?

    The cheapest time of day to fly to Guam is generally in the morning, when round-trip flights cost $2,431 on average. The most expensive time of day to fly to Guam is generally in the morning, which is peak travel time and where the average cost of a ticket is $2,431.

Reviews of the top airline flying from Ontario to Guam

 
Need help choosing which airline to fly with from Ontario to Guam? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8991 reviews
8.1Crew
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
Airline reviews

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

4.0 OkayAnonymous, Oct 2025SFO - PTY
Read more United Airlines reviews

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

Everything you need to know for your flight from Ontario to Guam

Information on your arrival and departure airports

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