$451+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jul 23 — Jul 301
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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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 23, 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 23, 2026.
This Delta deal was found by Cheapflights users on 6/22. 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.
Thu 10/16:00 am
ONT
- HAN
2 stops25h 35m
Delta
Tue 10/1311:10 pm
HAN
- ONT
2 stops32h 07m
Delta
Deal found 6/22![Delta logo]()
$956
This Korean Air deal was found by Cheapflights users on 6/22. 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 9/296:20 am
ONT
- HAN
2 stops25h 15m
Korean Air
Wed 10/1412:05 pm
HAN
- ONT
2 stops43h 12m
Korean Air
Deal found 6/22![Korean Air logo]()
$962
This oojo deal was found by Cheapflights users on 6/20. 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 8/1412:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Wed 8/2610:00 am
DAD
- ONT
1 stop22h 40m
China Airlines
Deal found 6/20![China Airlines logo]()
$969
This oojo deal was found by Cheapflights users on 6/21. 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.
Sat 9/1212:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Sun 9/2711:30 am
HAN
- ONT
1 stop20h 30m
China Airlines
Deal found 6/21![China Airlines logo]()
$972
This oojo deal was found by Cheapflights users on 6/21. 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
Thu 9/1710:00 am
DAD
- ONT
1 stop22h 00m
China Airlines
Deal found 6/21![China Airlines logo]()
$973
This oojo deal was found by Cheapflights users on 6/22. 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 8/512:45 am
ONT
- HAN
1 stop19h 45m
China Airlines
Mon 8/245:50 pm
HAN
- ONT
1 stop38h 50m
China Airlines
Deal found 6/22![China Airlines logo]()
$974
This oojo deal was found by Cheapflights users on 6/22. 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 9/1012:45 am
ONT
- DAD
1 stop18h 15m
China Airlines
Fri 9/255:30 pm
DAD
- ONT
1 stop38h 30m
China Airlines
Deal found 6/22![China Airlines logo]()
$975
This oojo deal was found by Cheapflights users on 6/19. 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 10/1912:10 am
ONT
- HAN
1 stop26h 40m
China Airlines
Tue 11/311:35 am
HAN
- ONT
1 stop20h 15m
China Airlines
Deal found 6/19![China Airlines logo]()
$975
This oojo deal was found by Cheapflights users on 6/19. 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.
Sat 9/1212:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Sun 9/275:30 pm
DAD
- ONT
1 stop38h 30m
China Airlines
Deal found 6/19![China Airlines logo]()
$976
This flugladen.de deal was found by Cheapflights users on 6/22. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Mon 8/245:50 pm
HAN
- ONT
1 stop38h 50m
China Airlines
Deal found 6/22![China Airlines logo]()
$976
This oojo deal was found by Cheapflights users on 6/22. 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 9/1012:45 am
ONT
- DAD
1 stop18h 15m
China Airlines
Sat 9/2610:00 am
DAD
- ONT
1 stop22h 00m
China Airlines
Deal found 6/22![China Airlines logo]()
$977
This oojo deal was found by Cheapflights users on 6/19. 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 8/2612:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Mon 9/711:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/19![China Airlines logo]()
$977
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 23, 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 23, 2026.
This Korean Air deal was found by Cheapflights users on 6/22. 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 9/296:20 am
ONT
- HAN
2 stops25h 15m
Korean Air
Wed 10/1412:05 pm
HAN
- ONT
2 stops43h 12m
Korean Air
Deal found 6/22![Korean Air logo]()
$962
This Delta deal was found by Cheapflights users on 6/21. 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 9/116:00 am
ONT
- HAN
2 stops25h 35m
Delta
Mon 9/2811:10 pm
HAN
- ONT
2 stops37h 30m
Delta
Deal found 6/21![Delta logo]()
$1,006
This China Airlines deal was found by Cheapflights users on 6/22. 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
- SGN
1 stop19h 30m
China Airlines
Thu 12/311:00 am
SGN
- ONT
1 stop20h 50m
China Airlines
Deal found 6/22![China Airlines logo]()
$1,015
This United Airlines deal was found by Cheapflights users on 6/21. 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.
Mon 8/179:01 am
ONT
- SGN
2 stops23h 04m
United Airlines
Wed 9/97:00 am
SGN
- ONT
3 stops25h 16m
United Airlines
Deal found 6/21![United Airlines logo]()
$1,024
This Qatar Airways deal was found by Cheapflights users on 6/21. 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.
Mon 10/2611:13 am
ONT
- HAN
2 stops29h 42m
Qatar Airways
Fri 11/67:10 pm
HAN
- ONT
2 stops38h 18m
Qatar Airways
Deal found 6/21![Qatar Airways logo]()
$1,111
This Delta deal was found by Cheapflights users on 6/20. 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 8/96:00 am
ONT
- SGN
2 stops27h 15m
Delta
Sun 9/67:30 am
SGN
- ONT
2 stops28h 53m
Delta
Deal found 6/20![Delta logo]()
$1,010
This China Airlines deal was found by Cheapflights users on 6/22. 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 9/3012:10 am
ONT
- SGN
1 stop19h 30m
China Airlines
Sun 11/295:50 pm
SGN
- ONT
1 stop38h 00m
China Airlines
Deal found 6/22![China Airlines logo]()
$1,015
This United Airlines deal was found by Cheapflights users on 6/18. 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 8/136:08 am
ONT
- SGN
2 stops25h 47m
United Airlines
Sat 9/57:00 am
SGN
- ONT
2 stops25h 16m
United Airlines
Deal found 6/18![United Airlines logo]()
$1,040
This Korean Air deal was found by Cheapflights users on 6/18. 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 9/116:20 am
ONT
- HAN
2 stops38h 15m
Korean Air
Sat 9/2612:05 pm
HAN
- ONT
2 stops48h 35m
Korean Air
Deal found 6/18![Korean Air logo]()
$1,062
This Delta deal was found by Cheapflights users on 6/20. 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 11/27:00 am
ONT
- SGN
2 stops38h 50m
Delta
Sun 12/611:50 pm
SGN
- ONT
2 stops38h 58m
Delta
Deal found 6/20![Delta logo]()
$1,010
This China Airlines deal was found by Cheapflights users on 6/22. 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 10/212:10 am
ONT
- SGN
1 stop19h 30m
China Airlines
Fri 11/2711:00 am
SGN
- ONT
1 stop20h 50m
China Airlines
Deal found 6/22![China Airlines logo]()
$1,041
This United Airlines deal was found by Cheapflights users on 6/19. 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 8/279:01 am
ONT
- HAN
2 stops23h 14m
United Airlines
Mon 9/711:35 pm
HAN
- ONT
2 stops28h 26m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,051
This Qatar Airways deal was found by Cheapflights users on 6/22. 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
Tue 9/157:30 pm
HAN
- ONT
2 stops37h 33m
Qatar Airways
Deal found 6/22![Qatar Airways logo]()
$1,171
This Korean Air deal was found by Cheapflights users on 6/18. 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 9/116:20 am
ONT
- HAN
2 stops38h 15m
Korean Air
Sun 9/2711:10 pm
HAN
- ONT
2 stops37h 30m
Korean Air
Deal found 6/18![Korean Air logo]()
$1,093
This Delta deal was found by Cheapflights users on 6/20. 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 8/106:00 am
ONT
- SGN
2 stops40h 35m
Delta
Tue 10/137:30 am
SGN
- ONT
2 stops23h 47m
Delta
Deal found 6/20![Delta logo]()
$1,010
This Trip.com deal was found by Cheapflights users on 6/19. 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.
Thu 11/1910:50 pm
ONT
- HAN
1 stop26h 40m
China Airlines
Sun 11/2911:35 am
HAN
- ONT
1 stop20h 15m
China Airlines
Deal found 6/19![China Airlines logo]()
$1,074
This Korean Air deal was found by Cheapflights users on 6/20. 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 7/146:20 am
ONT
- SGN
2 stops25h 50m
Korean Air
Wed 7/297:30 am
SGN
- ONT
2 stops23h 51m
Korean Air
Deal found 6/20![Korean Air logo]()
$1,101
This United Airlines deal was found by Cheapflights users on 6/19. 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 7/311:50 pm
ONT
- SGN
2 stops42h 15m
United Airlines
Thu 8/207:00 am
SGN
- ONT
2 stops27h 01m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,117
This Delta deal was found by Cheapflights users on 6/19. 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 8/266:20 am
ONT
- DAD
2 stops42h 00m
Delta
Wed 9/93:55 pm
DAD
- ONT
2 stops44h 09m
Delta
Deal found 6/19![Delta logo]()
$1,033
This China Airlines deal was found by Cheapflights users on 6/21. 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 12/210:50 pm
ONT
- HAN
1 stop20h 45m
China Airlines
Wed 1/1311:35 am
HAN
- ONT
1 stop20h 15m
China Airlines
Deal found 6/21![China Airlines logo]()
$1,085
This Korean Air deal was found by Cheapflights users on 6/19. 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.
Thu 10/227:00 am
ONT
- DAD
2 stops41h 20m
Korean Air
Mon 10/2611:20 pm
DAD
- ONT
2 stops31h 57m
Korean Air
Deal found 6/19![Korean Air logo]()
$1,116
This Delta deal was found by Cheapflights users on 6/18. 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 8/155:05 pm
ONT
- DAD
2 stops38h 00m
Delta
Wed 8/263:55 pm
DAD
- ONT
2 stops45h 39m
Delta
Deal found 6/18![Delta logo]()
$1,078
This United Airlines deal was found by Cheapflights users on 6/19. 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 8/136:08 am
ONT
- SGN
2 stops25h 47m
United Airlines
Thu 8/207:00 am
SGN
- ONT
2 stops25h 11m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,230
This China Airlines 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1912:45 am
ONT
- HAN
1 stop26h 05m
China Airlines
Tue 8/1111:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/23![China Airlines logo]()
$1,221
This Delta deal was found by Cheapflights users on 6/18. 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.
Tue 8/116:20 am
ONT
- HAN
2 stops25h 15m
Delta
Thu 8/2011:10 pm
HAN
- ONT
2 stops37h 35m
Delta
Deal found 6/18![Delta logo]()
$1,197
This Korean Air deal was found by Cheapflights users on 6/22. 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 7/146:20 am
ONT
- DAD
2 stops24h 45m
Korean Air
Tue 7/2110:55 pm
DAD
- ONT
2 stops37h 57m
Korean Air
Deal found 6/22![Korean Air logo]()
$1,338
This China Airlines 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1812:45 am
ONT
- HAN
1 stop19h 45m
China Airlines
Tue 8/1111:30 am
HAN
- ONT
1 stop21h 10m
China Airlines
Deal found 6/23![China Airlines logo]()
$1,221
This China Airlines deal was found by Cheapflights users on 6/22. 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 8/912:45 am
ONT
- DAD
2 stops29h 45m
China Airlines
Mon 8/315:45 am
DAD
- ONT
2 stops26h 55m
China Airlines
Deal found 6/22![China Airlines logo]()
$1,473
This Delta deal was found by Cheapflights users on 6/21. 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 7/139:40 am
ONT
- DAD
2 stops45h 25m
Delta
Sat 7/183:55 pm
DAD
- ONT
2 stops45h 53m
Delta
Deal found 6/21![Delta logo]()
$1,607
This China Airlines deal was found by Cheapflights users on 6/22. 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 7/1212:45 am
ONT
- DAD
1 stop25h 45m
China Airlines
Mon 7/205:45 am
DAD
- ONT
2 stops50h 55m
China Airlines
Deal found 6/22![China Airlines logo]()
$1,557
Last-minute flights from Ontario to VietnamDiscover last-minute flight deals from Ontario to Vietnam. Data last updated June 23, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Vietnam. Data last updated June 23, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/91:50 pm
ONT
- SGN
2 stops44h 25m
United Airlines
Tue 7/147:00 am
SGN
- ONT
2 stops29h 37m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,069
This Delta deal was found by Cheapflights users on 6/22. 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 7/121:00 pm
ONT
- HAN
2 stops55h 35m
Delta
Sun 7/1911:10 pm
HAN
- ONT
2 stops38h 38m
Delta
Deal found 6/22![Delta logo]()
$1,053
This Delta deal was found by Cheapflights users on 6/22. 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 7/136:00 am
ONT
- HAN
2 stops38h 35m
Delta
Sun 7/1911:10 pm
HAN
- ONT
2 stops38h 38m
Delta
Deal found 6/22![Delta logo]()
$1,046
This Korean Air 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:20 am
ONT
- SGN
2 stops25h 50m
Korean Air
Mon 7/271:55 pm
SGN
- ONT
2 stops41h 26m
Korean Air
Deal found 6/23![Korean Air logo]()
$1,101
This United Airlines deal was found by Cheapflights users on 6/21. 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 7/155:00 am
ONT
- SGN
2 stops29h 15m
United Airlines
Tue 9/1511:15 pm
SGN
- ONT
2 stops34h 46m
United Airlines
Deal found 6/21![United Airlines logo]()
$1,045
This United Airlines deal was found by Cheapflights users on 6/22. 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 stops26h 05m
United Airlines
Wed 9/3011:15 pm
SGN
- ONT
2 stops30h 07m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,050
This United Airlines 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 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 6/23![United Airlines logo]()
$1,068
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/286:00 am
ONT
- SGN
2 stops26h 05m
United Airlines
Mon 9/77:00 am
SGN
- ONT
3 stops25h 11m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,064
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/296:00 am
ONT
- SGN
3 stops26h 05m
United Airlines
Wed 9/27:00 am
SGN
- ONT
2 stops25h 16m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,048
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/296:00 am
ONT
- SGN
2 stops26h 05m
United Airlines
Thu 10/17:00 am
SGN
- ONT
2 stops22h 22m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,051
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/296:00 am
ONT
- SGN
3 stops26h 05m
United Airlines
Tue 9/87:00 am
SGN
- ONT
2 stops21h 01m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,060
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/306:00 am
ONT
- SGN
3 stops26h 05m
United Airlines
Wed 9/97:00 am
SGN
- ONT
2 stops25h 16m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,097
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 23, 2026.
Search for one-way flight options from Ontario to Vietnam. Find affordable one-way fares based on user searches. Data last updated June 23, 2026.
This Trip.com deal was found by Cheapflights users on 6/18. 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 8/48:58 am
ONT
- DAD
2 stops38h 12m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$451
This Kissandfly.com deal was found by Cheapflights users on 6/21. 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.
Sat 11/77:00 am
ONT
- SGN
2 stops24h 25m
Korean Air
Deal found 6/21![Korean Air logo]()
$484
This Trip.com deal was found by Cheapflights users on 6/21. 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 11/710:50 pm
ONT
- SGN
1 stop27h 00m
China Airlines
Deal found 6/21![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.
Sun 8/912:45 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 6/18. 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 8/1012:45 am
ONT
- SGN
1 stop25h 35m
China Airlines
Deal found 6/18![China Airlines logo]()
$491
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:50 pm
ONT
- SGN
1 stop20h 10m
China Airlines
Deal found 6/23![China Airlines logo]()
$493
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:20 am
ONT
- SGN
2 stops25h 50m
Delta
Deal found 6/23![Delta logo]()
$495
This oojo deal was found by Cheapflights users on 6/21. 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.
Sat 8/2912:45 am
ONT
- SGN
1 stop18h 55m
China Airlines
Deal found 6/21![China Airlines logo]()
$497
This FlightHub deal was found by Cheapflights users on 6/21. 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.
Wed 9/3012:10 am
ONT
- SGN
1 stop26h 10m
China Airlines
Deal found 6/21![China Airlines logo]()
$498
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:00 am
ONT
- SGN
2 stops27h 15m
Delta
Deal found 6/23![Delta logo]()
$499
This Korean Air deal was found by Cheapflights users on 6/18. 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 11/17:00 am
ONT
- HAN
2 stops23h 45m
Korean Air
Deal found 6/18![Korean Air logo]()
$499
This Korean Air 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:20 am
ONT
- SGN
2 stops26h 55m
Korean Air
Deal found 6/23![Korean Air logo]()
$502
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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $956 (Delta) |
One-way from | $451 (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 23, 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
OntarioHanoi
ONT - HAN
ONTHAN
Ontario
Tue 9/29
6:20 am-9:35 pm
2 stops25h 15m
Hanoi Noibai
Wed 10/14
12:05 pm-5:17 pm
2 stops43h 12m
$962
OntarioHanoi
ONT - HAN
ONTHAN
Ontario
Fri 9/11
6:00 am-9:35 pm
2 stops25h 35m
Hanoi Noibai
Mon 9/28
11:10 pm-10:40 pm
2 stops37h 30m
$1,006
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Sun 8/9
6:00 am-11:15 pm
2 stops27h 15m
Ho Chi Minh City
Sun 9/6
7:30 am-10:23 pm
2 stops28h 53m
$1,010
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Mon 11/2
7:00 am-12:50 pm
2 stops38h 50m
Ho Chi Minh City
Sun 12/6
11:50 pm-11:48 pm
2 stops38h 58m
$1,010
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Mon 8/10
6:00 am-12:35 pm
2 stops40h 35m
Ho Chi Minh City
Tue 10/13
7:30 am-5:17 pm
2 stops23h 47m
$1,010
Quickest round-trip
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Sat 9/26
12:10 am-9:40 am
1 stop19h 30m
Ho Chi Minh City
Thu 12/3
11:00 am-4:50 pm
1 stop20h 50m
$1,015
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Wed 9/30
12:10 am-9:40 am
1 stop19h 30m
Ho Chi Minh City
Sun 11/29
5:50 pm-4:50 pm
1 stop38h 00m
$1,015
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Mon 8/17
9:01 am-10:05 pm
2 stops23h 04m
Ho Chi Minh City
Wed 9/9
7:00 am-6:16 pm
3 stops25h 16m
$1,024
OntarioDa Nang
ONT - DAD
ONTDAD
Ontario
Wed 8/26
6:20 am-2:20 pm
2 stops42h 00m
Da Nang
Wed 9/9
3:55 pm-10:04 pm
2 stops44h 09m
$1,033
OntarioHo Chi Minh City
ONT - SGN
ONTSGN
Ontario
Thu 8/13
6:08 am-9:55 pm
2 stops25h 47m
Ho Chi Minh City
Sat 9/5
7:00 am-6:16 pm
2 stops25h 16m
$1,040
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-HAN
ONT-DAD
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-HAN
ONT-DAD
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 23, 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.
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
Reviews
1 / 14
8.0
ExcellentAndrew,Jun 2026
SEA - TPE
Overall
8.9
Boarding
8.9
Comfort
8.9
Food
8.7
Entertainment
8.8
Crew
9.2
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 23, 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 23, 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 |