$512+ Cheap flights from St. Louis (STL) to Vietnam
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SGN
Nov 18 — Nov 251
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis 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
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 St. Louis to Vietnam
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Cheapest flights from St. Louis to VietnamExplore the most affordable flight options available from St. Louis to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2026.
Explore the most affordable flight options available from St. Louis to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2026.
This Cathay Pacific deal was found by Cheapflights users on 10/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am -
2 stops29h 30m
Wed 11/187:15 am -
2 stops29h 44m
Deal found 10/19![Multiple Airlines logo]()
$1,077
This Cathay Pacific deal was found by Cheapflights users on 10/18. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:00 am -
2 stops31h 30m
Wed 11/117:15 am -
2 stops26h 27m
Deal found 10/18![Multiple Airlines logo]()
$1,084
This KAYAK deal was found by Cheapflights users on 10/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:10 am -
2 stops45h 25m
Wed 11/187:15 am -
2 stops24h 02m
Deal found 10/16![Cathay Pacific logo]()
$1,091
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:00 am -
2 stops47h 15m
Mon 11/1611:15 am -
2 stops42h 28m
Deal found 10/15![Cathay Pacific logo]()
$1,117
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:20 pm -
2 stops30h 45m
Sun 10/257:45 pm -
2 stops39h 57m
Deal found 10/15![Multiple Airlines logo]()
$1,127
This Cathay Pacific deal was found by Cheapflights users on 10/17. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:10 am -
2 stops36h 55m
Mon 11/167:25 pm -
2 stops38h 17m
Deal found 10/17![Multiple Airlines logo]()
$1,138
This IEagle deal was found by Cheapflights users on 10/15. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:04 am -
2 stops40h 31m
Fri 11/137:15 am -
3 stops29h 44m
Deal found 10/15![Multiple Airlines logo]()
$1,140
This Cathay Pacific deal was found by Cheapflights users on 10/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:04 am -
2 stops40h 01m
Fri 11/1311:15 am -
2 stops24h 24m
Deal found 10/19![Multiple Airlines logo]()
$1,143
This Korean Air deal was found by Cheapflights users on 10/18. 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.
Thu 11/127:13 am -
2 stops38h 57m
Mon 11/1612:20 pm -
2 stops38h 03m
Deal found 10/18![Korean Air logo]()
$1,173
This Expedia deal was found by Cheapflights users on 10/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:35 pm -
2 stops42h 05m
Sat 10/3111:00 pm -
2 stops35h 09m
Deal found 10/17![Delta logo]()
$1,175
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/307:30 am -
2 stops26h 45m
Sun 12/612:35 am -
2 stops33h 22m
Deal found 10/16![United Airlines logo]()
$1,177
This Korean Air deal was found by Cheapflights users on 10/18. 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.
Thu 11/56:00 am -
2 stops43h 15m
Mon 11/93:45 pm -
2 stops37h 58m
Deal found 10/18![Korean Air logo]()
$1,180
Best flights from St. Louis to VietnamDiscover carefully curated flight deals from St. Louis to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
Discover carefully curated flight deals from St. Louis to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:01 am -
2 stops39h 04m
Tue 2/2310:30 am -
2 stops25h 40m
Deal found 10/15![Multiple Airlines logo]()
$1,085
This Korean Air deal was found by Cheapflights users on 10/15. 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 11/127:13 am -
2 stops38h 57m
Mon 11/1612:20 pm -
2 stops38h 03m
Deal found 10/15![Korean Air logo]()
$1,173
This Delta deal was found by Cheapflights users on 10/18. 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 4/103:40 pm -
2 stops43h 35m
Sat 4/2411:45 pm -
2 stops36h 51m
Deal found 10/18![Delta logo]()
$1,174
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/307:30 am -
2 stops26h 45m
Sun 12/612:35 am -
2 stops33h 22m
Deal found 10/16![United Airlines logo]()
$1,177
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/101:17 pm -
2 stops35h 08m
Tue 2/236:05 pm -
3 stops53h 36m
Deal found 10/15![ANA logo]()
$1,758
This Qatar Airways deal was found by Cheapflights users on 10/15. 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 2/93:54 pm -
3 stops56h 46m
Mon 2/222:40 pm -
3 stops35h 59m
Deal found 10/15![Qatar Airways logo]()
$2,075
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:01 am -
2 stops39h 04m
Mon 2/227:25 pm -
2 stops41h 31m
Deal found 10/15![Multiple Airlines logo]()
$1,093
This Korean Air deal was found by Cheapflights users on 10/18. 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.
Thu 11/56:00 am -
2 stops43h 15m
Mon 11/93:45 pm -
2 stops37h 58m
Deal found 10/18![Korean Air logo]()
$1,180
This United Airlines deal was found by Cheapflights users on 10/17. 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 4/105:18 pm -
3 stops40h 47m
Sat 4/2411:15 pm -
2 stops34h 51m
Deal found 10/17![United Airlines logo]()
$1,184
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/86:01 am -
2 stops29h 29m
Wed 2/247:15 am -
2 stops29h 41m
Deal found 10/15![Multiple Airlines logo]()
$1,125
This United Airlines deal was found by Cheapflights users on 10/14. 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 1/45:59 pm -
3 stops40h 11m
Fri 2/57:30 am -
2 stops23h 20m
Deal found 10/14![United Airlines logo]()
$1,185
This Cathay Pacific deal was found by Cheapflights users on 10/17. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:10 am -
2 stops36h 55m
Mon 11/167:25 pm -
2 stops38h 17m
Deal found 10/17![Multiple Airlines logo]()
$1,138
This Korean Air deal was found by Cheapflights users on 10/15. 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.
Mon 2/86:00 am -
2 stops26h 40m
Tue 2/233:45 pm -
2 stops35h 58m
Deal found 10/15![Korean Air logo]()
$1,289
This United Airlines deal was found by Cheapflights users on 10/14. 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 1/45:59 pm -
3 stops40h 11m
Mon 3/811:30 pm -
2 stops30h 14m
Deal found 10/14![United Airlines logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/176:50 pm -
3 stops39h 20m
Tue 11/247:30 am -
2 stops27h 10m
Deal found 10/17![United Airlines logo]()
$1,187
This Cathay Pacific deal was found by Cheapflights users on 10/14. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/67:05 am -
2 stops47h 05m
Sat 4/177:10 pm -
2 stops39h 07m
Deal found 10/14![Multiple Airlines logo]()
$1,188
This United Airlines deal was found by Cheapflights users on 10/17. 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 1/193:03 pm -
3 stops43h 07m
Thu 2/256:00 am -
3 stops28h 12m
Deal found 10/17![United Airlines logo]()
$1,193
This United Airlines deal was found by Cheapflights users on 10/14. 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 1/46:58 pm -
3 stops39h 12m
Thu 2/46:00 am -
3 stops28h 37m
Deal found 10/14![United Airlines logo]()
$1,193
This Korean Air deal was found by Cheapflights users on 10/15. 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 2/106:00 am -
2 stops26h 40m
Wed 2/2411:00 pm -
2 stops37h 18m
Deal found 10/15![Multiple Airlines logo]()
$1,358
This United Airlines deal was found by Cheapflights users on 10/14. 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 1/66:45 pm -
3 stops39h 25m
Mon 3/86:00 am -
3 stops29h 06m
Deal found 10/14![United Airlines logo]()
$1,193
This Qatar Airways deal was found by Cheapflights users on 10/15. 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 2/93:54 pm -
3 stops56h 46m
Tue 2/2311:40 am -
3 stops43h 33m
Deal found 10/15![Qatar Airways logo]()
$2,243
This United Airlines deal was found by Cheapflights users on 10/15. 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 2/85:06 pm -
3 stops41h 04m
Tue 2/236:00 am -
3 stops25h 38m
Deal found 10/15![United Airlines logo]()
$1,193
This Qatar Airways deal was found by Cheapflights users on 10/15. 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.
Wed 2/109:58 am -
3 stops38h 42m
Tue 2/2311:40 am -
3 stops45h 36m
Deal found 10/15![Qatar Airways logo]()
$2,347
This Korean Air deal was found by Cheapflights users on 10/18. 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.
Thu 12/176:03 am -
2 stops26h 37m
Tue 12/2211:00 pm -
2 stops28h 43m
Deal found 10/18![Multiple Airlines logo]()
$1,776
This Mytrip deal was found by Cheapflights users on 10/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/303:04 pm -
3 stops30h 01m
Mon 12/76:20 pm -
3 stops34h 06m
Deal found 10/16![Multiple Airlines logo]()
$2,400
Last-minute flights from St. Louis to VietnamDiscover last-minute flight deals from St. Louis to Vietnam. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Vietnam. Data last updated October 19, 2026 and is based on user searches.
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:20 pm -
2 stops30h 45m
Sun 10/257:45 pm -
2 stops39h 57m
Deal found 10/15![Multiple Airlines logo]()
$1,127
This Expedia deal was found by Cheapflights users on 10/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:35 pm -
2 stops42h 05m
Sat 10/3111:00 pm -
2 stops35h 09m
Deal found 10/17![Delta logo]()
$1,175
This Cathay Pacific deal was found by Cheapflights users on 10/18. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:00 am -
2 stops31h 30m
Wed 11/117:15 am -
2 stops26h 27m
Deal found 10/18![Multiple Airlines logo]()
$1,084
This Cathay Pacific deal was found by Cheapflights users on 10/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:04 am -
2 stops40h 01m
Fri 11/1311:15 am -
2 stops24h 24m
Deal found 10/19![Multiple Airlines logo]()
$1,143
This IEagle deal was found by Cheapflights users on 10/15. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:04 am -
2 stops40h 31m
Fri 11/137:15 am -
3 stops29h 44m
Deal found 10/15![Multiple Airlines logo]()
$1,140
This Cathay Pacific deal was found by Cheapflights users on 10/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am -
2 stops29h 30m
Wed 11/187:15 am -
2 stops29h 44m
Deal found 10/19![Multiple Airlines logo]()
$1,077
This KAYAK deal was found by Cheapflights users on 10/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:10 am -
2 stops45h 25m
Wed 11/187:15 am -
2 stops24h 02m
Deal found 10/16![Cathay Pacific logo]()
$1,091
This Korean Air deal was found by Cheapflights users on 10/18. 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.
Thu 11/56:00 am -
2 stops43h 15m
Mon 11/93:45 pm -
2 stops37h 58m
Deal found 10/18![Korean Air logo]()
$1,180
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:00 am -
2 stops47h 15m
Mon 11/1611:15 am -
2 stops42h 28m
Deal found 10/15![Cathay Pacific logo]()
$1,117
This Cathay Pacific deal was found by Cheapflights users on 10/18. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:10 am -
2 stops36h 55m
Mon 11/167:25 pm -
2 stops38h 17m
Deal found 10/18![Multiple Airlines logo]()
$1,138
This Korean Air deal was found by Cheapflights users on 10/15. 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 11/127:13 am -
2 stops38h 57m
Mon 11/1612:20 pm -
2 stops38h 03m
Deal found 10/15![Korean Air logo]()
$1,173
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/307:30 am -
2 stops26h 45m
Sun 12/612:35 am -
2 stops33h 22m
Deal found 10/16![United Airlines logo]()
$1,177
One-way flights from St. Louis to VietnamSearch for one-way flight options from St. Louis to Vietnam. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
Search for one-way flight options from St. Louis to Vietnam. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 1/207:02 pm -
3 stops51h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$512
This Etihad Airways deal was found by Cheapflights users on 10/18. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/235:14 am -
2 stops35h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Multiple Airlines logo]()
$542
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/196:01 am -
2 stops29h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$550
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 1/67:02 pm -
3 stops50h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$573
This KAYAK deal was found by Cheapflights users on 10/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:01 am -
2 stops53h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Cathay Pacific logo]()
$578
This KAYAK deal was found by Cheapflights users on 10/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/146:01 am -
2 stops29h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Cathay Pacific logo]()
$583
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Mon 1/47:49 pm -
3 stops50h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$602
This Expedia deal was found by Cheapflights users on 10/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/173:54 pm -
2 stops43h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$604
This Cathay Pacific deal was found by Cheapflights users on 10/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/246:00 pm -
2 stops37h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$610
This Cathay Pacific deal was found by Cheapflights users on 10/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 am -
2 stops42h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Multiple Airlines logo]()
$611
This Cathay Pacific deal was found by Cheapflights users on 10/16. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/27:23 am -
2 stops38h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Multiple Airlines logo]()
$612
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:04 am -
2 stops40h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Alaska Airlines logo]()
$621
Find flight deals from St. Louis to Vietnam
Keep the following information in mind while searching for St. Louis to Vietnam flight deals. Data was last updated October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,077 (Cathay Pacific) |
One-way from | $512 (Kiwi.com) |
Popular in | December |
Cheapest in | April |
Average price | $1,151 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 7,457,451 searches. Data last updated October 19, 2026.
Use the filters below to find and compare flights from St. Louis to Vietnam that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Tue 2/23
5:14 am-6:10 am
2 stops35h 56m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$542
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Thu 1/14
6:01 am-12:30 am
2 stops29h 29m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$583
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Sat 3/13
5:59 pm-11:00 pm
3 stops40h 01m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$604
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Fri 4/2
7:23 am-9:55 am
2 stops38h 32m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$611
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Sun 11/1
8:10 am-3:45 pm
2 stops42h 35m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$611
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Tue 1/5
5:06 pm-11:10 pm
3 stops41h 04m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$633
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Thu 1/14
5:59 pm-11:10 pm
3 stops40h 11m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$633
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Sun 1/24
5:06 pm-11:10 pm
3 stops41h 04m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$633
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Sun 11/29
7:08 am-9:45 pm
2 stops25h 37m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$644
St. LouisHo Chi Minh City
STL Lambert-St Louis - SGN Ho Chi Minh City
STLSGN
Lambert-St Louis
Mon 1/4
6:04 am-12:15 am
2 stops29h 11m
Ho Chi Minh City
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$649
Showing 1-10 of 46 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Vietnam
Have a flexible travel schedule? Discover the best time to fly to Vietnam from St. Louis with our price prediction graph.
STL-SGN
STL-HAN
STL-DAD
STL-CXR
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 St. Louis to Vietnam
STL-VN0
STL-SGN
STL-HAN
STL-DAD
STL-CXR
What is the cheapest month to book a flight from St. Louis to Vietnam?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Vietnam (average of $1,073). Flying from St. Louis to Vietnam in December is currently the most expensive (average of $1,716). 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 St. Louis to Vietnam?
Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Vietnam. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 October 19, 2026.
Read through reviews of airlines operating flights from St. Louis to Vietnam, such as Japan Airlines,ANA, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Crew
8.7
Overall
8.3
Food
7.7
Boarding
8.4
Comfort
8.2
Entertainment
7.8
Reviews
1 / 20
4.0
OkayClark,Aug 2026
BDL - ORD
Related info for your journey
Find useful and relevant information for your journey from St. Louis 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 St. Louis to Vietnam
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Complete your trip
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St. Louis and Vietnam flights
Browse other St. Louis and Vietnam flight options. Last updated on October 19, 2026.
Popular flight searches
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Fly to Vietnam regions
Consider these flights traveling to Vietnam regions.
Top 6 airlines flying from St. Louis to Vietnam
Discover the top 6 airlines that operate flights from St. Louis 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 7,457,451 searches. Data last updated October 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$561 | Average$1,191 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$936 | Average$1,300 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$945 | Average$1,177 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$991 | Average$1,151 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$998 | Average$1,268 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,110 | Average$1,489 | FlexibilityNo cancel fee | On-timeN/A |