$387 Find Cheap Flights from Ontario to Southeast Asia - Compare and Save

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 Southeast Asia departing on 7/30. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Southeast Asia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Southeast Asia.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Southeast Asia.
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Flight Deals

Cheap Flights from Ontario to Southeast Asia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok2 stops$853
Manila
Manila1 stop$1,090
Singapore
Singapore2 stops$834
Denpasar
Denpasar2 stops$952
Hanoi
Hanoi2 stops$956
Phuket City
Phuket City2 stops$984
Cebu City
Cebu City2 stops$806
Da Nang
Da Nang1 stop$969
Chiang Mai
Chiang Mai2 stops$895
Angeles City
Angeles City1 stop$985
Krabi
Krabi2 stops$1,219
Bangkok
Bangkok2 stops$853
Manila
Manila1 stop$1,090
Singapore
Singapore2 stops$834
Denpasar
Denpasar2 stops$952
Hanoi
Hanoi2 stops$956
Phuket City
Phuket City2 stops$984
Cebu City
Cebu City2 stops$806
Da Nang
Da Nang1 stop$969
Chiang Mai
Chiang Mai2 stops$895
Angeles City
Angeles City1 stop$985
Krabi
Krabi2 stops$1,219

Book Cheap Ontario to Southeast Asia 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 Southeast Asia 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 Southeast Asia

Sun, Oct 18 - Sat, Nov 14
Delta Logo
7:00 am - 12:45 am
ONT
-
CGK
27h 45m
2 stops
Delta Logo
9:50 pm - 4:12 pm
CGK
-
ONT
33h 22m
2 stops
$768Delta
Sun, Aug 30 - Tue, Sep 15
Delta Logo
6:00 am - 12:45 am
ONT
-
CGK
28h 45m
2 stops
Delta Logo
2:15 am - 10:40 pm
CGK
-
ONT
34h 25m
2 stops
$769Delta
Mon, Oct 19 - Sat, Nov 14
Korean Air Logo
7:00 am - 12:45 am
ONT
-
CGK
27h 45m
2 stops
Korean Air Logo
9:50 pm - 5:17 pm
CGK
-
ONT
34h 27m
2 stops
$774Korean Air
Mon, Sep 7 - Tue, Sep 15
Korean Air Logo
6:20 am - 11:30 pm
ONT
-
CEB
26h 10m
2 stops
Korean Air Logo
1:00 am - 5:20 pm
CEB
-
ONT
31h 20m
2 stops
$806Korean Air
Wed, Oct 14 - Wed, Oct 21
United Airlines Logo
8:03 am - 6:35 pm
ONT
-
SIN
19h 32m
1 stop
United Airlines Logo
8:45 am - 3:22 pm
SIN
-
ONT
21h 37m
1 stop
$873United Airlines
Wed, Aug 19 - Mon, Aug 31
United Airlines Logo
1:56 pm - 5:05 am
ONT
-
CGK
49h 09m
2 stops
United Airlines Logo
9:25 pm - 8:01 pm
CGK
-
ONT
36h 36m
2 stops
$875United Airlines
Thu, Aug 6 - Sun, Aug 23
China Airlines Logo
12:45 am - 11:05 am
ONT
-
CEB
19h 20m
1 stop
China Airlines Logo
12:05 pm - 6:40 pm
CEB
-
ONT
21h 35m
1 stop
$894China Airlines
Tue, Aug 11 - Mon, Aug 31
China Airlines Logo
12:45 am - 11:05 am
ONT
-
CEB
19h 20m
1 stop
China Airlines Logo
12:05 pm - 6:40 pm
CEB
-
ONT
21h 35m
1 stop
$906China Airlines
Sat, Sep 12 - Sat, Oct 3
STARLUX Airlines Logo
11:30 pm - 7:30 pm
ONT
-
CRK
29h 00m
1 stop
STARLUX Airlines Logo
10:00 am - 5:05 pm
CRK
-
ONT
22h 05m
1 stop
$985STARLUX Airlines
Sat, Sep 12 - Sat, Oct 3
STARLUX Airlines Logo
3:14 pm - 7:30 pm
ONT
-
CRK
37h 16m
2 stops
STARLUX Airlines Logo
10:00 am - 5:05 pm
CRK
-
ONT
22h 05m
1 stop
$992STARLUX Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Southeast Asia flights

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

Can I save money by flying with a layover from Ontario to Southeast Asia?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $421, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Ontario to Southeast Asia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Southeast Asia is April, when tickets cost $360 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,899 and $1,552 respectively.

How far in advance should I book a flight from Ontario to Southeast Asia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Southeast Asia, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$387
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Ontario to Singapore

FAQs - booking Southeast Asia flights

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

    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 Southeast Asia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Southeast Asia 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 Southeast Asia?

    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 Southeast Asia 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 Southeast Asia?

    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 Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Ontario to Southeast Asia

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Southeast Asia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Southeast Asia? 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.
8.9
STARLUX AirlinesOverall score based on 341 reviews
8.9Boarding
8.8Entertainment
8.9Comfort
9.2Crew
8.6Food
Airline reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

8.0 Excellentjoseph, Jun 2026
TPE - SFO
Read more STARLUX Airlines reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

Customer service in Hanoi needs work, outside of that, everything was good.

Premium economy seats that I paid extra are not worthed.there was not much difference from the regular economy seats yet I paid alot more for it Disappointed

It did not feel like a luxury airline. We had booked premium economy and opted for AVML meals. This was one of the worst meal in any of the flights and I’m a frequent flyer. No great snack options were available. Drink selection was limited to wine and beer. On a long flight, you need a variety of food which was unfortunately not available. The seats were just OK and the foot rest are not comfortable.. Airline staff for courteous Audio and video section is extremely limited

Hostesses were very nice I am disappointed that I paid extra 900$for premium economy which wasn't much upgraded from regular economy, I have wasted my money on this trip 😫

amazing and great food. everything was smooth from start to finished

love this boutique luxury airline. crew was nice and attentive. Lounge is too small , i think they should have more area for relaxing and lounging not just to sit and eat .. feels like a cafeteria more than a lounge. overall i enjoy it. food on the plane LAX to Teipei should inprove a bit. no flavor and more drinks pls

The overall experience with STARLUX was phenomenal. One of the best highlights for me was the smooth landing in LA(smoothest landing I’ve experienced ever) and the attentiveness of all your staff from check-in to boarding. Also, flight left and landed between airports on time. I highly recommend Starlux to my family and friends and I’m excited to fly with you again.

FLEW IN BUSINESS CLASS OVER NIGHT FLIGHT AIRLINE BOOKED A PARENT AND ONE YEAR OLD KID PARENT ALLOWED THE KID TO DISTURB EVERYONES SLEEP A terrible flight that was expensive I have 10 grand children I love kids But to be disturbed on a over night flight is in not what I paid for I hold the air line responsible Respectfully, Al Eaddy

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

The crew were professional and attentive. Blankets and pillows were on each seat which was appreciated. The food was served warm and had a balance of various nutritional options. As far as the monitor there were not enough English speaking choices and foreign shows did not offer English captions.

We boarded late and it snowballed from there. Had to wait behind 6 other flights to take off before us. Then, arriving late to our destination, we had to circle in the air for 20 minutes. If that's not enough, the seats are very cramped on their iteration if the A321neo. I'm 6"3' tall and my knees were pressed against the seat in front of me. These are not the slimline seats that offer less cushion with more leg room. I had no room to move my legs. Since I am an adult male, I also had no shoulder room. I sat on an aisle seat to have some space to lean my should out. But the walkway seemed to be more narrow than I am used to see. I felt bad for the middle passenger because there was just no where for me to put my shoulders except into the middle seat person. I don't plan to fly in this airline again in this configuration. Pack everyone in and lose my business.

The crew was very professional and friendly. Although there was a water leak from panel above, the crew was trying to mitigate the consequence. We are happy with its service and the value offered. We will definitely take China Airlines again.

Flight attendants. Food, entertainment and most of all, be on time.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

Smooth sailing trip, pilots are good. Less amount of food offered but the quality is okey.

Humm, I should have known that the seat I peaked on my flight from Inchon to Manila was designed for a toddler or very small person.

The staff hold my luggage to steel and exchange my stub, i was very disappointed.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

When one asks for water because they are dehydrated, bring more then a sip or two in a small cup. Bring them a whole bottle.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

Better screens, it would have been nice to have more comfortable seats.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Service was professional and quick. Premium economy seat was comfortable given the class

It was perfect! United Airlines staff was extremely caring, super friendly and professional

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Everything you need to know for your flight to Southeast Asia

Information on your arrival and departure airports