$1,657 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 2/25. 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, 0 bags

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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

Wed, May 6 - Wed, May 20
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
$1,869United Airlines
Mon, Mar 2 - Fri, Mar 20
Delta Logo
6:00 am - 2:35 pm
ONT
-
GUM
38h 35m
2 stops
Delta Logo
4:50 pm - 10:34 pm
GUM
-
ONT
46h 44m
2 stops
$1,904Delta
Mon, Apr 13 - Fri, Apr 24
United Airlines Logo
6:00 am - 6:05 pm
ONT
-
GUM
19h 05m
2 stops
United Airlines Logo
7:05 am - 12:37 pm
GUM
-
ONT
22h 32m
2 stops
$1,919United Airlines
Sat, Mar 7 - Mon, Mar 30
United Airlines Logo
6:37 pm - 6:50 pm
ONT
-
GUM
54h 13m
2 stops
United Airlines Logo
7:05 am - 5:47 pm
GUM
-
ONT
27h 42m
3 stops
$2,205United Airlines
Mon, Mar 2 - Fri, Mar 20
United Airlines Logo
9:06 pm - 7:05 pm
ONT
-
GUM
27h 59m
2 stops
United Airlines Logo
7:25 am - 5:41 pm
GUM
-
ONT
27h 16m
3 stops
$2,229United Airlines
Mon, Mar 2 - Fri, Mar 20
United Airlines Logo
6:37 pm - 4:20 am
ONT
-
GUM
39h 43m
3 stops
United Airlines Logo
7:25 am - 5:41 pm
GUM
-
ONT
27h 16m
3 stops
$2,253United Airlines
Fri, Mar 6 - Sun, Mar 15
United Airlines Logo
6:15 am - 7:05 pm
ONT
-
GUM
18h 50m
2 stops
United Airlines Logo
7:25 am - 12:18 pm
GUM
-
ONT
21h 53m
2 stops
$2,279United Airlines
Wed, Jun 24 - Tue, Jun 30
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
$2,309United Airlines
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
6:10 am - 7:05 pm
ONT
-
GUM
18h 55m
2 stops
United Airlines Logo
7:40 am - 12:38 pm
GUM
-
ONT
22h 58m
2 stops
$2,379United Airlines
Thu, Feb 26 - Thu, Mar 5
United Airlines Logo
6:10 am - 7:05 pm
ONT
-
GUM
18h 55m
2 stops
United Airlines Logo
12:30 pm - 12:18 pm
GUM
-
ONT
17h 48m
2 stops
$2,406United Airlines
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.

Which airlines provide the cheapest flights from Ontario to Guam?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Guam were found on United Airlines ($1,869) and Delta ($1,904).

Good to know

Cheapest flight$1,657
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.

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 9219 reviews
7.1Entertainment
6.6Food
8.1Crew
7.3Comfort
7.7Boarding
Airline reviews

The food was terrible this time. Otherwise pleasant, quiet, on-time.

8.0 ExcellentAnonymous, Jan 2026
SAN - MUC
Read more United Airlines reviews

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

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

Information on your arrival and departure airports