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Cheap flights from Quito to St. Louis from $322

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Quito to St. Louis departing on 9/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Quito to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:35 am - 11:33 pm
UIO
-
STL
22h 58m
2 stops
United Airlines Logo
6:15 am - 6:10 am
STL
-
UIO
22h 55m
1 stop
$782United Airlines
Sun, Dec 20 - Thu, Dec 31
United Airlines Logo
12:35 am - 3:43 pm
UIO
-
STL
39h 08m
2 stops
United Airlines Logo
6:50 pm - 11:30 pm
STL
-
UIO
28h 40m
2 stops
$800United Airlines
Thu, Oct 15 - Sun, Oct 25
United Airlines Logo
1:35 am - 11:33 pm
UIO
-
STL
22h 58m
2 stops
United Airlines Logo
6:50 pm - 12:30 am
STL
-
UIO
28h 40m
2 stops
$812United Airlines
Sun, Dec 20 - Fri, Jan 1
American Airlines Logo
6:00 am - 9:49 pm
UIO
-
STL
15h 49m
1 stop
American Airlines Logo
5:00 am - 8:51 pm
STL
-
UIO
15h 51m
1 stop
$816American Airlines
Wed, Sep 23 - Wed, Sep 30
American Airlines Logo
6:00 am - 12:27 am
UIO
-
STL
18h 27m
2 stops
American Airlines Logo
6:53 am - 8:51 pm
STL
-
UIO
13h 58m
2 stops
$820American Airlines
Wed, Sep 23 - Wed, Sep 30
United Airlines Logo
12:35 am - 10:10 am
UIO
-
STL
9h 35m
1 stop
United Airlines Logo
6:15 am - 5:00 am
STL
-
UIO
22h 45m
1 stop
$830United Airlines
Thu, Sep 17 - Sun, Sep 27
Air Canada Logo
9:30 am - 3:26 pm
UIO
-
STL
30h 56m
2 stops
Air Canada Logo
4:05 pm - 1:05 am
STL
-
UIO
32h 00m
2 stops
$835Air Canada
Mon, Dec 21 - Sat, Jan 2
United Airlines Logo
1:35 am - 9:18 pm
UIO
-
STL
20h 43m
2 stops
United Airlines Logo
6:15 am - 12:30 am
STL
-
UIO
17h 15m
1 stop
$842United Airlines
Sat, Dec 19 - Fri, Jan 1
United Airlines Logo
1:35 am - 11:33 pm
UIO
-
STL
22h 58m
2 stops
United Airlines Logo
6:50 pm - 12:30 am
STL
-
UIO
28h 40m
2 stops
$872United Airlines
Sun, Dec 20 - Mon, Jan 4
United Airlines Logo
7:45 am - 10:19 pm
UIO
-
STL
15h 34m
1 stop
United Airlines Logo
6:15 am - 6:10 am
STL
-
UIO
22h 55m
1 stop
$876United Airlines
Mon, Dec 21 - Sun, Jan 3

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United Airlines flights from Quito to St. Louis

Our best United Airlines deals on Quito to St. Louis flight tickets
United Airlines
Dec 20
UIO1:35 amQuito Mariscal Sucr
22h 58m
2 stops
STL11:33 pmLambert-St Louis
Dec 31
STL6:15 amLambert-St Louis
22h 55m
1 stop
UIO6:10 amQuito Mariscal Sucr
$782
United Airlines
Oct 15
UIO12:35 amQuito Mariscal Sucr
39h 08m
2 stops
STL3:43 pmLambert-St Louis
Oct 25
STL6:50 pmLambert-St Louis
28h 40m
2 stops
UIO11:30 pmQuito Mariscal Sucr
$800
United Airlines
Dec 20
UIO1:35 amQuito Mariscal Sucr
22h 58m
2 stops
STL11:33 pmLambert-St Louis
Jan 1
STL6:50 pmLambert-St Louis
28h 40m
2 stops
UIO12:30 amQuito Mariscal Sucr
$812

American Airlines flights from Quito to St. Louis

Our best American Airlines deals on Quito to St. Louis flight tickets
American Airlines
Sep 23
UIO6:00 amQuito Mariscal Sucr
15h 49m
1 stop
STL9:49 pmLambert-St Louis
Sep 30
STL5:00 amLambert-St Louis
15h 51m
1 stop
UIO8:51 pmQuito Mariscal Sucr
$816
American Airlines
Sep 23
UIO6:00 amQuito Mariscal Sucr
18h 27m
2 stops
STL12:27 amLambert-St Louis
Sep 30
STL6:53 amLambert-St Louis
13h 58m
2 stops
UIO8:51 pmQuito Mariscal Sucr
$820
American Airlines
Aug 7
UIO6:00 amQuito Mariscal Sucr
16h 40m
1 stop
STL10:40 pmLambert-St Louis
Aug 16
STL5:00 amLambert-St Louis
18h 57m
1 stop
UIO11:57 pmQuito Mariscal Sucr
$1,102

momondo Fare Finder

 
Customize your flight search to find flights from Quito to St. Louis 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, momondo users made 832,500 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Quito to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Sun 12/20

1:35 am-11:33 pm

2 stops22h 58m

Lambert-St Louis

Thu 12/31

6:15 am-6:10 am

1 stop22h 55m

$782

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Thu 10/15

12:35 am-3:43 pm

2 stops39h 08m

Lambert-St Louis

Sun 10/25

6:50 pm-11:30 pm

2 stops28h 40m

$800

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Sun 12/20

1:35 am-11:33 pm

2 stops22h 58m

Lambert-St Louis

Fri 1/1

6:50 pm-12:30 am

2 stops28h 40m

$812
Quickest round-trip

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Wed 9/23

6:00 am-9:49 pm

1 stop15h 49m

Lambert-St Louis

Wed 9/30

5:00 am-8:51 pm

1 stop15h 51m

$816

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Wed 9/23

6:00 am-12:27 am

2 stops18h 27m

Lambert-St Louis

Wed 9/30

6:53 am-8:51 pm

2 stops13h 58m

$820

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Thu 9/17

12:35 am-10:10 am

1 stop9h 35m

Lambert-St Louis

Sun 9/27

6:15 am-5:00 am

1 stop22h 45m

$830

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Mon 12/21

9:30 am-3:26 pm

2 stops30h 56m

Lambert-St Louis

Sat 1/2

4:05 pm-1:05 am

2 stops32h 00m

$835

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Sat 12/19

1:35 am-9:18 pm

2 stops20h 43m

Lambert-St Louis

Fri 1/1

6:15 am-12:30 am

1 stop17h 15m

$842

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Sun 12/20

1:35 am-11:33 pm

2 stops22h 58m

Lambert-St Louis

Mon 1/4

6:50 pm-12:30 am

2 stops28h 40m

$872

QuitoSt. Louis

UIO - STL

UIOSTL

Quito Mariscal Sucr

Mon 12/21

7:45 am-10:19 pm

1 stop15h 34m

Lambert-St Louis

Sun 1/3

6:15 am-6:10 am

1 stop22h 55m

$876

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Quito to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, October is the cheapest month to fly from Quito to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of December is another great option to travel to St. Louis, with average flight prices from Quito averaging around $639.

Can stopping save me money on Quito to St. Louis flights?

You could potentially save up to 1% on your flight if you consider stops on a Quito to St. Louis flight.

When to book flights from Quito to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Quito to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Quito to St. Louis (UIO to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Quito to St. Louis

Fastest flight time

25h 20m

Direct flights

None
The fastest flight from Quito to St. Louis takes 25h 20m
There are no direct flights from Quito to St. Louis. There are no popular flight routes from Quito to St. Louis.
Search flight deals

Frequently asked questions about flying from Quito to St. Louis

  • How far is Quito Mariscal Sucr to Lambert-St Louis by plane?

    A flight from Quito Mariscal Sucr to Lambert-St Louis will travel around 2783.2 mi. In terms of flight time, this usually takes a little over 25h 20m.

  • When did momondo last update prices for flights from Quito Mariscal Sucr Airport to Lambert-St Louis Airport?

    Prices for flights from Quito Mariscal Sucr Airport to Lambert-St Louis Airport refresh daily.

  • How old do you have to be to fly from Quito Mariscal Sucr Airport to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Quito Mariscal Sucr Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
O'Fallon
Alton
Fenton
Farmington
Clayton
Wentzville
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Quito to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Quito to St. Louis for you.

Can I find flights from Quito to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Quito on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Quito to St. Louis?

Once all potential Quito to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Quito to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Quito are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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