$454+ Cheap flights from Ontario (ONT) to Vietnam
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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jul 28 — Aug 41
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Vietnam 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
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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 Vietnam
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Cheapest flights from Ontario to VietnamExplore the most affordable flight options available from Ontario to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
Explore the most affordable flight options available from Ontario to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
This Delta deal was found by Cheapflights users on 6/24. 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 9/286:20 am
ONT
- HAN
2 stops25h 15m
Delta
Wed 10/711:10 pm
HAN
- ONT
2 stops32h 07m
Delta
Deal found 6/24![Delta logo]()
$956
This oojo deal was found by Cheapflights users on 6/27. 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.
Tue 8/2512:45 am
ONT
- DAD
1 stop18h 15m
China Airlines
Wed 9/910:00 am
DAD
- ONT
1 stop22h 40m
China Airlines
Deal found 6/27![China Airlines logo]()
$967
This oojo deal was found by Cheapflights users on 6/26. 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 10/512:10 am
ONT
- DAD
1 stop18h 50m
China Airlines
Sat 10/1710:00 am
DAD
- ONT
1 stop22h 00m
China Airlines
Deal found 6/26![China Airlines logo]()
$968
This oojo deal was found by Cheapflights users on 6/26. 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 8/2112:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Wed 9/910:00 am
DAD
- ONT
1 stop22h 40m
China Airlines
Deal found 6/26![China Airlines logo]()
$969
This oojo deal was found by Cheapflights users on 6/27. 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.
Wed 9/212:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Sun 9/135:30 pm
DAD
- ONT
1 stop39h 10m
China Airlines
Deal found 6/27![China Airlines logo]()
$972
This oojo deal was found by Cheapflights users on 6/27. 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.
Thu 8/2712:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Tue 9/1511:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/27![China Airlines logo]()
$972
This oojo deal was found by Cheapflights users on 6/27. 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 9/712:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Tue 9/155:50 pm
HAN
- ONT
1 stop38h 10m
China Airlines
Deal found 6/27![China Airlines logo]()
$974
This oojo deal was found by Cheapflights users on 6/28. 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.
Sun 11/2210:50 pm
ONT
- HAN
1 stop26h 40m
China Airlines
Sat 12/511:35 am
HAN
- ONT
1 stop20h 15m
China Airlines
Deal found 6/28![China Airlines logo]()
$975
This oojo deal was found by Cheapflights users on 6/25. 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 8/2112:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Wed 9/1611:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/25![China Airlines logo]()
$977
This oojo deal was found by Cheapflights users on 6/27. 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 9/2512:10 am
ONT
- HAN
1 stop20h 20m
China Airlines
Thu 10/811:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/27![China Airlines logo]()
$979
This oojo deal was found by Cheapflights users on 6/24. 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.
Wed 9/212:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Sun 9/205:30 pm
DAD
- ONT
1 stop38h 30m
China Airlines
Deal found 6/24![China Airlines logo]()
$980
This oojo deal was found by Cheapflights users on 6/24. 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 9/2812:10 am
ONT
- HAN
1 stop26h 40m
China Airlines
Thu 10/85:50 pm
HAN
- ONT
1 stop38h 10m
China Airlines
Deal found 6/24![China Airlines logo]()
$983
Best flights from Ontario to VietnamDiscover carefully curated flight deals from Ontario to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
Discover carefully curated flight deals from Ontario to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
This China Airlines deal was found by Cheapflights users on 6/28. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:50 pm
ONT
- SGN
1 stop27h 00m
China Airlines
Sat 12/55:50 pm
SGN
- ONT
1 stop38h 00m
China Airlines
Deal found 6/28![China Airlines logo]()
$989
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:52 pm
ONT
- SGN
2 stops40h 58m
United Airlines
Wed 2/311:05 pm
SGN
- ONT
2 stops39h 01m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,002
This Delta deal was found by Cheapflights users on 6/26. 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.
Sun 8/96:20 am
ONT
- SGN
2 stops25h 50m
Delta
Sun 10/1111:45 pm
SGN
- ONT
2 stops36h 58m
Delta
Deal found 6/26![Delta logo]()
$1,010
This Korean Air deal was found by Cheapflights users on 6/24. 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.
Fri 10/307:00 am
ONT
- HAN
2 stops24h 45m
Korean Air
Sun 11/1511:05 pm
HAN
- ONT
2 stops33h 12m
Korean Air
Deal found 6/24![Korean Air logo]()
$1,012
This STARLUX Airlines deal was found by Cheapflights users on 6/27. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:30 pm
ONT
- DAD
1 stop28h 40m
STARLUX Airlines
Sun 10/256:25 pm
DAD
- ONT
1 stop36h 30m
STARLUX Airlines
Deal found 6/27![STARLUX Airlines logo]()
$1,065
This Qatar Airways deal was found by Cheapflights users on 6/28. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:12 pm
ONT
- HAN
2 stops29h 03m
Qatar Airways
Wed 9/168:45 am
HAN
- ONT
2 stops52h 39m
Qatar Airways
Deal found 6/28![Qatar Airways logo]()
$1,113
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:00 am
ONT
- SGN
2 stops24h 50m
United Airlines
Thu 12/177:30 am
SGN
- ONT
2 stops19h 50m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,003
This Delta deal was found by Cheapflights users on 6/27. 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.
Sat 8/86:20 am
ONT
- SGN
2 stops26h 55m
Delta
Sat 8/291:55 pm
SGN
- ONT
2 stops47h 39m
Delta
Deal found 6/27![Delta logo]()
$1,010
This China Airlines deal was found by Cheapflights users on 6/24. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2512:10 am
ONT
- HAN
1 stop20h 20m
China Airlines
Tue 10/611:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/24![China Airlines logo]()
$1,020
This Korean Air deal was found by Cheapflights users on 6/26. 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 11/16:20 am
ONT
- HAN
2 stops24h 25m
Korean Air
Thu 11/512:20 pm
HAN
- ONT
2 stops43h 52m
Korean Air
Deal found 6/26![Korean Air logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am
ONT
- SGN
2 stops27h 15m
United Airlines
Wed 11/257:30 am
SGN
- ONT
2 stops22h 53m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,006
This Delta deal was found by Cheapflights users on 6/25. 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.
Sat 8/226:00 am
ONT
- SGN
2 stops26h 10m
Delta
Sat 9/1911:45 pm
SGN
- ONT
2 stops36h 55m
Delta
Deal found 6/25![Delta logo]()
$1,010
This China Airlines deal was found by Cheapflights users on 6/28. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Sun 9/1311:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/28![China Airlines logo]()
$1,020
This Korean Air deal was found by Cheapflights users on 6/24. 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.
Fri 8/146:20 am
ONT
- DAD
2 stops24h 45m
Korean Air
Tue 8/2510:55 pm
DAD
- ONT
2 stops32h 26m
Korean Air
Deal found 6/24![Korean Air logo]()
$1,078
This United Airlines deal was found by Cheapflights users on 6/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:00 am
ONT
- SGN
2 stops27h 15m
United Airlines
Thu 12/177:30 am
SGN
- ONT
2 stops19h 50m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,006
This China Airlines deal was found by Cheapflights users on 6/24. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2612:10 am
ONT
- HAN
1 stop26h 40m
China Airlines
Tue 10/611:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/24![China Airlines logo]()
$1,020
This Delta deal was found by Cheapflights users on 6/27. 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.
Wed 8/266:00 am
ONT
- DAD
2 stops42h 20m
Delta
Wed 9/93:55 pm
DAD
- ONT
2 stops44h 09m
Delta
Deal found 6/27![Delta logo]()
$1,033
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:08 am
ONT
- SGN
2 stops25h 47m
United Airlines
Tue 9/227:00 am
SGN
- ONT
2 stops21h 01m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,020
This China Airlines deal was found by Cheapflights users on 6/28. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:45 am
ONT
- HAN
1 stop19h 45m
China Airlines
Tue 9/1511:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/28![China Airlines logo]()
$1,020
This Delta deal was found by Cheapflights users on 6/27. 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.
Wed 8/196:20 am
ONT
- DAD
2 stops42h 00m
Delta
Wed 9/910:55 pm
DAD
- ONT
2 stops37h 45m
Delta
Deal found 6/27![Delta logo]()
$1,033
This Korean Air deal was found by Cheapflights users on 6/26. 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.
Wed 10/216:00 am
ONT
- DAD
2 stops25h 05m
Korean Air
Sun 10/253:45 pm
DAD
- ONT
2 stops46h 01m
Korean Air
Deal found 6/26![Korean Air logo]()
$1,166
This China Airlines deal was found by Cheapflights users on 6/24. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/110:50 pm
ONT
- HAN
1 stop26h 40m
China Airlines
Thu 11/511:35 am
HAN
- ONT
1 stop20h 15m
China Airlines
Deal found 6/24![China Airlines logo]()
$1,020
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:00 am
ONT
- SGN
2 stops27h 15m
United Airlines
Thu 2/46:00 am
SGN
- ONT
2 stops21h 20m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,023
This Delta deal was found by Cheapflights users on 6/26. 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.
Sat 10/36:20 am
ONT
- DAD
2 stops24h 45m
Delta
Sat 10/1710:55 pm
DAD
- ONT
2 stops38h 53m
Delta
Deal found 6/26![Delta logo]()
$1,110
This China Airlines deal was found by Cheapflights users on 6/28. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Thu 9/1711:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/28![China Airlines logo]()
$1,020
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/136:08 am
ONT
- SGN
2 stops25h 47m
United Airlines
Tue 9/297:00 am
SGN
- ONT
2 stops22h 11m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,023
This Delta deal was found by Cheapflights users on 6/24. 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.
Sat 8/226:20 am
ONT
- DAD
2 stops24h 45m
Delta
Sat 9/53:55 pm
DAD
- ONT
2 stops44h 28m
Delta
Deal found 6/24![Delta logo]()
$1,110
This United Airlines deal was found by Cheapflights users on 6/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am
ONT
- SGN
2 stops26h 05m
United Airlines
Mon 11/26:00 am
SGN
- ONT
2 stops24h 23m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,028
This Delta deal was found by Cheapflights users on 6/25. 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.
Sat 9/266:00 pm
ONT
- DAD
2 stops37h 05m
Delta
Sat 10/310:55 pm
DAD
- ONT
2 stops37h 45m
Delta
Deal found 6/25![Delta logo]()
$1,116
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:00 am
ONT
- HAN
2 stops24h 15m
United Airlines
Sat 9/1911:35 pm
HAN
- ONT
2 stops32h 36m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,051
Last-minute flights from Ontario to VietnamDiscover last-minute flight deals from Ontario to Vietnam. Data last updated June 28, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Vietnam. Data last updated June 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:50 pm
ONT
- HAN
2 stops42h 25m
United Airlines
Wed 7/1511:35 pm
HAN
- ONT
2 stops37h 02m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,057
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:50 pm
ONT
- HAN
2 stops42h 25m
United Airlines
Sun 7/1911:35 pm
HAN
- ONT
2 stops37h 02m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,065
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:00 am
ONT
- HAN
2 stops26h 15m
United Airlines
Sun 7/1911:35 pm
HAN
- ONT
2 stops37h 02m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,059
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:00 am
ONT
- HAN
2 stops26h 15m
United Airlines
Mon 7/2011:35 pm
HAN
- ONT
2 stops29h 54m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,051
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:39 pm
ONT
- SGN
2 stops39h 36m
United Airlines
Fri 7/177:00 am
SGN
- ONT
2 stops29h 37m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,069
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:00 am
ONT
- SGN
2 stops25h 55m
United Airlines
Fri 8/287:00 am
SGN
- ONT
2 stops25h 11m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,060
This United Airlines deal was found by Cheapflights users on 6/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ONT
- SGN
2 stops28h 15m
United Airlines
Tue 9/1511:15 pm
SGN
- ONT
2 stops34h 46m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,045
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:00 am
ONT
- SGN
2 stops29h 15m
United Airlines
Thu 8/207:00 am
SGN
- ONT
2 stops27h 01m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,063
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/221:50 pm
ONT
- SGN
2 stops42h 15m
United Airlines
Sun 8/307:00 am
SGN
- ONT
2 stops27h 01m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,068
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:00 am
ONT
- SGN
2 stops26h 05m
United Airlines
Wed 1/207:30 am
SGN
- ONT
2 stops25h 17m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,051
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:00 am
ONT
- SGN
2 stops26h 05m
United Airlines
Thu 8/207:00 am
SGN
- ONT
2 stops43h 12m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,074
This Delta deal was found by Cheapflights users on 6/24. 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 7/3111:59 am
ONT
- SGN
2 stops44h 11m
Delta
Sat 8/87:30 am
SGN
- ONT
2 stops29h 15m
Delta
Deal found 6/24![Delta logo]()
$1,067
One-way flights from Ontario to VietnamSearch for one-way flight options from Ontario to Vietnam. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
Search for one-way flight options from Ontario to Vietnam. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
This Trip.com deal was found by Cheapflights users on 6/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:13 pm
ONT
- SGN
2 stops27h 17m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$454
This Trip.com deal was found by Cheapflights users on 6/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am
ONT
- SGN
2 stops26h 15m
Korean Air
Deal found 6/24![Korean Air logo]()
$475
This Kissandfly.com deal was found by Cheapflights users on 6/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:20 am
ONT
- SGN
2 stops26h 55m
Korean Air
Deal found 6/27![Korean Air logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:13 pm
ONT
- SGN
2 stops33h 12m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$483
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:05 pm
ONT
- SGN
2 stops51h 50m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/183:13 pm
ONT
- SGN
2 stops27h 17m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$486
This SmartFares deal was found by Cheapflights users on 6/27. 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 7/266:20 am
ONT
- HAN
2 stops25h 15m
Korean Air
Deal found 6/27![Korean Air logo]()
$486
This Trip.com deal was found by Cheapflights users on 6/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 am
ONT
- SGN
1 stop26h 10m
China Airlines
Deal found 6/27![China Airlines logo]()
$487
This Trip.com deal was found by Cheapflights users on 6/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:10 am
ONT
- SGN
1 stop19h 30m
China Airlines
Deal found 6/24![China Airlines logo]()
$488
This Trip.com deal was found by Cheapflights users on 6/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:45 am
ONT
- SGN
1 stop18h 55m
China Airlines
Deal found 6/23![China Airlines logo]()
$489
This Trip.com deal was found by Cheapflights users on 6/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:45 am
ONT
- SGN
1 stop25h 35m
China Airlines
Deal found 6/24![China Airlines logo]()
$490
This Gotogate deal was found by Cheapflights users on 6/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:50 pm
ONT
- SGN
1 stop27h 00m
China Airlines
Deal found 6/24![China Airlines logo]()
$493
Find flight deals from Ontario to Vietnam
Keep the following information in mind while searching for Ontario to Vietnam flight deals. Data was last updated June 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $956 (Delta) |
One-way from | $454 (Trip.com) |
Popular in | December |
Cheapest in | September |
Average price | $1,127 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Vietnam 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 June 28, 2026.
Use the filters below to find and compare flights from Ontario to Vietnam that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Mon 11/16
10:50 pm-4:50 pm
1 stop27h 00m
Ho Chi Minh City
Sat 12/5
5:50 pm-4:50 pm
1 stop38h 00m
$989
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Wed 11/11
1:52 pm-9:50 pm
2 stops40h 58m
Ho Chi Minh City
Wed 2/3
11:05 pm-11:06 pm
2 stops39h 01m
$1,002
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Wed 11/25
6:00 am-9:50 pm
2 stops24h 50m
Ho Chi Minh City
Thu 12/17
7:30 am-12:20 pm
2 stops19h 50m
$1,003
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Wed 11/11
6:00 am-12:15 am
2 stops27h 15m
Ho Chi Minh City
Wed 11/25
7:30 am-3:23 pm
2 stops22h 53m
$1,006
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Tue 11/24
6:00 am-12:15 am
2 stops27h 15m
Ho Chi Minh City
Thu 12/17
7:30 am-12:20 pm
2 stops19h 50m
$1,006
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Sun 8/9
6:20 am-10:10 pm
2 stops25h 50m
Ho Chi Minh City
Sun 10/11
11:45 pm-10:43 pm
2 stops36h 58m
$1,010
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Sat 8/8
6:20 am-11:15 pm
2 stops26h 55m
Ho Chi Minh City
Sat 8/29
1:55 pm-11:34 pm
2 stops47h 39m
$1,010
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Sat 8/22
6:00 am-10:10 pm
2 stops26h 10m
Ho Chi Minh City
Sat 9/19
11:45 pm-10:40 pm
2 stops36h 55m
$1,010
OntarioHanoi
ONT - HAN
ONTHAN
Ontario
Fri 10/30
7:00 am-9:45 pm
2 stops24h 45m
Hanoi Noibai
Sun 11/15
11:05 pm-5:17 pm
2 stops33h 12m
$1,012
Quickest round-trip
OntarioHanoi
ONT - HAN
ONTHAN
Ontario
Fri 9/25
12:10 am-10:30 am
1 stop20h 20m
Hanoi Noibai
Tue 10/6
11:30 am-6:00 pm
1 stop20h 30m
$1,020
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Vietnam
Have a flexible travel schedule? Discover the best time to fly to Vietnam from Ontario with our price prediction graph.
ONT-SGN
ONT-DAD
ONT-HAN
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 Vietnam
ONT-VN0
ONT-SGN
ONT-DAD
ONT-HAN
What is the cheapest month to book a flight from Ontario to Vietnam?
Currently, April is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $360). Flying from Ontario to Vietnam in December is currently the most expensive (average of $928). 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.
How far ahead should I book a flight from Ontario to Vietnam?
The best time to book flights from Ontario to Vietnam is 65 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing Vietnam
Get insights into the airlines that provide service to Vietnam. 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 Vietnam. Reviews last updated June 28, 2026.
See what other customers who have flown with STARLUX Airlines,Korean Air, andChina Airlines from Ontario to Vietnam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Crew
9.2
Entertainment
8.8
Boarding
8.9
Comfort
8.9
Overall
8.9
Food
8.7
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Related info for your journey
Find useful and relevant information for your journey from Ontario to Vietnam. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ontario to Vietnam
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Vietnam by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Vietnam by cabin class
Find flights from Ontario to Vietnam, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Vietnam flights
Browse other Ontario and Vietnam flight options. Last updated on June 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Vietnam flights
Consider these flights traveling from Ontario to Vietnam.
Fly to Vietnam regions
Consider these flights traveling to Vietnam regions.
Top 5 airlines flying from Ontario to Vietnam
Discover the top 5 airlines that operate flights from Ontario to Vietnam. 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 June 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$611 | Average$772 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$654 | Average$735 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$691 | Average$809 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$735 | Average$917 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$742 | Average$847 | FlexibilityNo cancel fee | On-timeN/A |