$551+ Cheap flights from St. Louis (STL) to Hanoi (HAN)
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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
Oct 3 — Oct 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Hanoi with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Hanoi
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to HanoiExplore the most affordable flight options available from St. Louis to Hanoi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 3, 2026.
Explore the most affordable flight options available from St. Louis to Hanoi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 3, 2026.
This oojo deal was found by Cheapflights users on 9/2. 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 11/97:26 am -
2 stops39h 54m
Mon 11/167:10 pm -
2 stops36h 07m
Deal found 9/2![Qatar Airways logo]()
$1,035
This Cathay Pacific deal was found by Cheapflights users on 8/30. 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 11/95:05 am -
2 stops40h 00m
Mon 11/1611:15 am -
2 stops42h 28m
Deal found 8/30![Multiple Airlines logo]()
$1,084
This Cathay Pacific deal was found by Cheapflights users on 8/31. 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 10/136:04 am -
2 stops39h 51m
Tue 10/207:10 pm -
2 stops40h 49m
Deal found 8/31![Multiple Airlines logo]()
$1,129
This China Airlines deal was found by Cheapflights users on 8/31. 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 10/257:05 pm -
2 stops33h 25m
Thu 11/55:30 pm -
2 stops38h 30m
Deal found 8/31![Multiple Airlines logo]()
$1,132
This Cathay Pacific deal was found by Cheapflights users on 9/3. 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 10/187:29 am -
2 stops38h 26m
Sun 10/2511:15 am -
2 stops45h 42m
Deal found 9/3![Multiple Airlines logo]()
$1,134
This Cathay Pacific deal was found by Cheapflights users on 8/30. 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.
Thu 9/1711:01 am -
2 stops43h 09m
Mon 9/2111:00 am -
2 stops24h 43m
Deal found 8/30![Cathay Pacific logo]()
$1,174
This United Airlines deal was found by Cheapflights users on 9/1. 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 -
2 stops28h 05m
Sun 11/1512:25 am -
2 stops34h 27m
Deal found 9/1![United Airlines logo]()
$1,189
This United Airlines deal was found by Cheapflights users on 9/2. 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 12/56:33 am -
2 stops27h 32m
Thu 12/1712:25 am -
2 stops36h 13m
Deal found 9/2![United Airlines logo]()
$1,236
This oojo deal was found by Cheapflights users on 8/30. 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 12/57:26 am -
2 stops25h 59m
Fri 12/1811:55 pm -
2 stops29h 55m
Deal found 8/30![Japan Airlines logo]()
$1,252
This KAYAK deal was found by Cheapflights users on 9/1. 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.
Sat 11/146:44 pm -
2 stops26h 21m
Sat 11/2811:15 am -
2 stops35h 11m
Deal found 9/1![Cathay Pacific logo]()
$1,339
Best flights from St. Louis to HanoiDiscover carefully curated flight deals from St. Louis to Hanoi that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 3, 2026.
Discover carefully curated flight deals from St. Louis to Hanoi that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 3, 2026.
This Cathay Pacific deal was found by Cheapflights users on 8/30. 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 11/95:05 am -
2 stops40h 00m
Mon 11/1611:15 am -
2 stops42h 28m
Deal found 8/30![Multiple Airlines logo]()
$1,084
This Cathay Pacific deal was found by Cheapflights users on 8/31. 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.
Thu 9/1711:01 am -
2 stops43h 09m
Mon 9/2111:00 am -
2 stops24h 43m
Deal found 8/31![Cathay Pacific logo]()
$1,174
This United Airlines deal was found by Cheapflights users on 9/1. 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 -
2 stops28h 05m
Sun 11/1512:25 am -
2 stops34h 27m
Deal found 9/1![United Airlines logo]()
$1,189
This Cathay Pacific deal was found by Cheapflights users on 8/31. 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 10/136:04 am -
2 stops39h 51m
Tue 10/207:10 pm -
2 stops40h 49m
Deal found 8/31![Multiple Airlines logo]()
$1,129
This United Airlines deal was found by Cheapflights users on 9/2. 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 1/45:20 am -
2 stops28h 45m
Thu 1/1412:25 am -
2 stops30h 29m
Deal found 9/2![United Airlines logo]()
$1,213
This KAYAK deal was found by Cheapflights users on 9/1. 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.
Sat 11/146:44 pm -
2 stops26h 21m
Sat 11/2811:15 am -
2 stops35h 11m
Deal found 9/1![Cathay Pacific logo]()
$1,339
This United Airlines deal was found by Cheapflights users on 9/2. 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 1/36:58 pm -
2 stops39h 07m
Thu 1/1412:25 am -
2 stops30h 29m
Deal found 9/2![United Airlines logo]()
$1,219
This China Airlines deal was found by Cheapflights users on 9/3. 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 10/187:05 pm -
2 stops27h 25m
Sun 10/255:30 pm -
3 stops41h 20m
Deal found 9/3![Multiple Airlines logo]()
$1,244
Last-minute flights from St. Louis to HanoiDiscover last-minute flight deals from St. Louis to Hanoi. Data last updated September 3, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Hanoi. Data last updated September 3, 2026 and is based on user searches.
This Cathay Pacific deal was found by Cheapflights users on 8/30. 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.
Thu 9/1711:01 am -
2 stops43h 09m
Mon 9/2111:00 am -
2 stops24h 43m
Deal found 8/30![Cathay Pacific logo]()
$1,174
This Cathay Pacific deal was found by Cheapflights users on 8/31. 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 10/136:04 am -
2 stops39h 51m
Tue 10/207:10 pm -
2 stops40h 49m
Deal found 8/31![Multiple Airlines logo]()
$1,129
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/157:08 am -
2 stops27h 07m
Thu 10/2211:35 pm -
2 stops33h 46m
Deal found 8/31![United Airlines logo]()
$1,560
This Cathay Pacific deal was found by Cheapflights users on 9/3. 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 10/187:29 am -
2 stops38h 26m
Sun 10/2511:15 am -
2 stops45h 42m
Deal found 9/3![Multiple Airlines logo]()
$1,134
This China Airlines deal was found by Cheapflights users on 8/31. 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 10/257:05 pm -
2 stops33h 25m
Thu 11/55:30 pm -
2 stops38h 30m
Deal found 8/31![Multiple Airlines logo]()
$1,132
One-way flights from St. Louis to HanoiSearch for one-way flight options from St. Louis to Hanoi. Find affordable one-way fares based on user searches. Data last updated September 3, 2026.
Search for one-way flight options from St. Louis to Hanoi. Find affordable one-way fares based on user searches. Data last updated September 3, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/2. 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 3/17:29 am -
2 stops45h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$551
This Qatar Airways deal was found by Cheapflights users on 8/31. 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.
Fri 10/97:02 am -
2 stops36h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Qatar Airways logo]()
$695
This KAYAK deal was found by Cheapflights users on 9/2. 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.
Fri 10/91:06 pm -
2 stops32h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Cathay Pacific logo]()
$747
This Malaysia Airlines deal was found by Cheapflights users on 9/2. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:04 am -
3 stops42h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Malaysia Airlines logo]()
$1,635
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
Fri 11/137:00 am -
3 stops38h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$2,691
This BusinessClass deal was found by Cheapflights users on 9/3. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:30 pm -
1 stop26h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$4,843
Find flight deals from St. Louis to Hanoi
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Hanoi (HAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,035 (oojo) |
One-way from | $551 (Cathay Pacific) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Hanoi that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 3, 2026.
Use the filters below to find and compare flights from St. Louis to Hanoi 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
Mon 3/1
7:29 am-6:15 pm
2 stops45h 46m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$551
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Fri 10/9
1:06 pm-9:55 am
2 stops32h 49m
Hanoi Noibai
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$747
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Mon 11/9
5:05 am-10:05 am
2 stops40h 00m
Hanoi Noibai
Mon 11/16
11:15 am-4:43 pm
2 stops42h 28m
$1,084
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Tue 10/13
6:04 am-9:55 am
2 stops39h 51m
Hanoi Noibai
Tue 10/20
7:10 pm-11:59 pm
2 stops40h 49m
$1,129
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Thu 9/17
11:01 am-6:10 pm
2 stops43h 09m
Hanoi Noibai
Mon 9/21
11:00 am-11:43 pm
2 stops24h 43m
$1,174
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Thu 11/12
6:00 am-11:05 pm
2 stops28h 05m
Hanoi Noibai
Sun 11/15
12:25 am-9:52 pm
2 stops34h 27m
$1,189
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Mon 1/4
5:20 am-11:05 pm
2 stops28h 45m
Hanoi Noibai
Thu 1/14
12:25 am-5:54 pm
2 stops30h 29m
$1,213
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Sun 1/3
6:58 pm-11:05 pm
2 stops39h 07m
Hanoi Noibai
Thu 1/14
12:25 am-5:54 pm
2 stops30h 29m
$1,219
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Sun 10/18
7:05 pm-10:30 am
2 stops27h 25m
Hanoi Noibai
Sun 10/25
5:30 pm-10:50 pm
3 stops41h 20m
$1,244
St. LouisHanoi
STL Lambert-St Louis - HAN Hanoi Noibai
STLHAN
Lambert-St Louis
Sat 11/14
6:44 pm-10:05 am
2 stops26h 21m
Hanoi Noibai
Sat 11/28
11:15 am-9:26 am
2 stops35h 11m
$1,339
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Hanoi
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Hanoi in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Hanoi flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Hanoi flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Hanoi flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Hanoi flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Hanoi flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Hanoi
Have a flexible travel schedule? Discover the best time to fly to Hanoi from St. Louis with our price prediction graph.
STL-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.
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Hanoi. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Hanoi flight routes
Other flight options
Other flights from St. Louis
Popular flights