$1,303 Find Cheap Flights from Ontario to Guam

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Guam departing on 10/2. 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

Cheap Flights from Ontario to Guam

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Tamuning
Tamuning2 stops$1,303
Tamuning
Tamuning2 stops$1,303

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, Oct 2 - Mon, Oct 6
United Airlines Logo
1:53 pm - 3:55 pmONT-GUM
57h 02m2 stops
United Airlines Logo
7:10 am - 5:23 pmGUM-ONT
27h 13m2 stops
$1,303United Airlines
Find Deal
Wed, Dec 3 - Thu, Mar 12
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
7:25 am - 12:33 pmGUM-ONT
22h 08m2 stops
$1,867United Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:37 pmGUM-ONT
17h 37m2 stops
$1,895United Airlines
Find Deal
Sun, Feb 1 - Thu, Apr 30
United Airlines Logo
6:00 am - 7:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:00 am - 12:19 pmGUM-ONT
22h 19m2 stops
$1,917United Airlines
Find Deal
Sat, Nov 29 - Wed, Dec 10
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
$1,945United Airlines
Find Deal
Mon, Nov 3 - Thu, Nov 13
United Airlines Logo
6:00 am - 6:50 pmONT-GUM
18h 50m2 stops
United Airlines Logo
1:00 pm - 12:37 pmGUM-ONT
17h 37m2 stops
$2,050United Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
United Airlines Logo
5:05 am - 9:50 pmONT-GUM
23h 45m2 stops
United Airlines Logo
7:10 am - 5:40 pmGUM-ONT
27h 30m2 stops
$2,205United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
6:00 am - 9:50 pmONT-GUM
22h 50m2 stops
United Airlines Logo
12:30 pm - 3:02 pmGUM-ONT
19h 32m2 stops
$2,225United Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
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
$2,305United Airlines
Find Deal
Wed, Sep 3 - Wed, Sep 17
United Airlines Logo
6:00 am - 6:05 pmONT-GUM
19h 05m2 stops
United Airlines Logo
7:10 am - 12:13 pmGUM-ONT
22h 03m2 stops
$2,427United Airlines
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

Low seasonOctober
Cheapest flight$1,303
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 40% increase in price.
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 8928 reviews
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

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.

6.0 GoodMarydoug, Aug 2025SJC - DEN
Read more United Airlines reviews

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.

The best airline I have ever travel , really good customer service, attention and service !!

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

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

Information on your arrival and departure airports

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