HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Hanoi

$335+ Cheap flights from Ontario (ONT) to Hanoi (HAN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HAN
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Hanoi with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Hanoi

Cheapest flights from Ontario to Hanoi
Explore the most affordable flight options available from Ontario to Hanoi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This Korean Air deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/296:00 am
ONT
-
HAN
2 stops25h 35m
Korean Air
Tue 4/711:10 pm
HAN
-
ONT
2 stops32h 03m
Korean Air
Deal found 2/12$640
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:00 am
ONT
-
HAN
2 stops24h 45m
Delta
Thu 11/1912:20 pm
HAN
-
ONT
2 stops19h 57m
Delta
Deal found 2/11$685
This Korean Air deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am
ONT
-
HAN
2 stops23h 45m
Korean Air
Mon 11/1611:05 pm
HAN
-
ONT
2 stops33h 12m
Korean Air
Deal found 2/11$690
This oojo deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/610:50 pm
ONT
-
HAN
1 stop26h 40m
China Airlines
Mon 11/2311:35 am
HAN
-
ONT
1 stop20h 15m
China Airlines
Deal found 2/11$724
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:00 am
ONT
-
HAN
2 stops25h 35m
Delta
Thu 5/711:10 pm
HAN
-
ONT
2 stops32h 00m
Delta
Deal found 2/11$735
This oojo deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:10 am
ONT
-
HAN
1 stop26h 40m
China Airlines
Tue 5/1911:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 2/10$740
This SmartFares deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:10 am
ONT
-
HAN
1 stop20h 20m
China Airlines
Fri 5/2211:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 2/12$742
This SmartFares deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:45 am
ONT
-
HAN
1 stop26h 05m
China Airlines
Sat 9/2611:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 2/9$743
This SmartFares deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:45 am
ONT
-
HAN
1 stop19h 45m
China Airlines
Mon 9/2111:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 2/11$745
This FlightHub deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:10 am
ONT
-
HAN
1 stop26h 40m
China Airlines
Wed 5/611:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 2/11$747
This FlightHub deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:50 pm
ONT
-
HAN
1 stop20h 45m
China Airlines
Mon 11/1611:35 am
HAN
-
ONT
1 stop20h 15m
China Airlines
Deal found 2/11$756
This oojo deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2011:10 pm
ONT
-
HAN
1 stop27h 40m
STARLUX Airlines
Mon 4/2711:10 am
HAN
-
ONT
1 stop19h 55m
STARLUX Airlines
Deal found 2/11$761

Find flight deals from Ontario to Hanoi

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Hanoi (HAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$640
(Korean Air)

One-way from

$335
(Delta)

Popular in

December

Cheapest in

October

Average price

$812
Provider with most accurate pricing for Ontario-Hanoi Noibai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Hanoi Noibai flights.
Search Deals
From Ontario to Hanoi Noibai
Search Deals
One-way flight from Ontario to Hanoi Noibai
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($262 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 13% potential price decrease ($113 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Hanoi 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, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
Use the filters below to find and compare flights from Ontario to Hanoi that are best for you.

Fly from

Ontario

Fly to

Hanoi

Route

Depart

Return

Price

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/21

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Wed 5/6

11:10 pm-5:10 pm

2 stops32h 00m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 3/29

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

Tue 4/7

11:10 pm-5:13 pm

2 stops32h 03m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 4/22

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Wed 5/6

11:10 pm-5:10 pm

2 stops32h 00m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 4/23

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Wed 5/6

11:10 pm-5:10 pm

2 stops32h 00m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 4/22

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Thu 5/7

11:10 pm-10:19 pm

2 stops37h 09m

$685

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Sat 5/9

11:10 pm-5:10 pm

2 stops32h 00m

$690

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sat 4/25

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Thu 5/7

11:10 pm-11:34 pm

2 stops38h 24m

$735

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 4/13

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Tue 5/19

11:30 am-6:00 pm

1 stop20h 30m

$740

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Sat 5/9

11:30 am-6:00 pm

1 stop20h 30m

$740

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Mon 5/11

11:30 am-6:00 pm

1 stop20h 30m

$740

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Ontario to Hanoi

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Hanoi in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Hanoi flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Hanoi flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Hanoi flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Hanoi flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Hanoi flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Hanoi

Have a flexible travel schedule? Discover the best time to fly to Hanoi from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Hanoi

What is the cheapest month to book a flight from Ontario to Hanoi?

Currently, April is the cheapest month in which you can book a flight from Ontario to Hanoi (average of $304). Flying from Ontario to Hanoi in July is currently the most expensive (average of $815). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Hanoi

Get insights into the airlines that provide service to Hanoi. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Hanoi. Reviews last updated February 13, 2026.
Read through reviews of airlines operating flights from Ontario to Hanoi, such as China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
804 reviews

Comfort

8.0

Entertainment

8.0

Overall

8.3

Food

7.8

Boarding

8.3

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.3
Very good
804 reviews
China Airlines
8.3
Very good
804 reviews

Comfort

8.0

Entertainment

8.0

Overall

8.3

Food

7.8

Boarding

8.3

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Hanoi. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Hanoi?

    Korean Air and Delta can get you from Ontario to Hanoi in just under 24h 35m. Your travel time can differ by up to . The distance from Ontario to Hanoi is about 7664 mi.

  • What is the cheapest airline to fly from Ontario to Hanoi round-trip?

    Flying on China Airlines is currently your cheapest option to Hanoi, with prices starting at $304. This flight start at 68% lower than the current average price 3 months from now.

  • Can I find deals for flights from Ontario to Hanoi that include hotel bookings?

    Yes. In addition to deals on Ontario to Hanoi flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Hanoi?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Hanoi.

  • Can I find deals for business class flights from Ontario to Hanoi?

    Yes. Cheapflights offers flight deals from Ontario to Hanoi by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Hanoi?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Hanoi (average of $304). Flying from Ontario to Hanoi in July is currently the most expensive (average of $815). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ontario to Hanoi

Discover the top airline that operate flights from Ontario to Hanoi. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$304Average$850FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2026 Cheapflights