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Cheap flights from St. Louis to Ecuador from $667

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ecuador departing on 10/28. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Ecuador

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
5:30 pm - 4:58 am
STL
-
UIO
11h 28m
2 stops
LATAM Airlines Logo
7:00 pm - 6:01 pm
UIO
-
STL
24h 01m
2 stops
$667LATAM Airlines
Wed, Oct 28 - Wed, Nov 11
Delta Logo
3:42 pm - 4:58 am
STL
-
UIO
13h 16m
2 stops
Delta Logo
12:55 am - 6:01 pm
UIO
-
STL
18h 06m
1 stop
$692Delta
Wed, Oct 28 - Tue, Nov 10
United Airlines Logo
8:35 am - 11:30 pm
STL
-
UIO
14h 55m
1 stop
United Airlines Logo
1:35 am - 10:05 am
UIO
-
STL
9h 30m
1 stop
$697United Airlines
Wed, Oct 28 - Tue, Nov 10
United Airlines Logo
2:56 pm - 12:30 am
STL
-
UIO
8h 34m
1 stop
United Airlines Logo
1:35 am - 4:39 pm
UIO
-
STL
16h 04m
1 stop
$727United Airlines
Sat, Nov 14 - Fri, Nov 20
American Airlines Logo
8:40 am - 11:02 pm
STL
-
UIO
13h 22m
2 stops
American Airlines Logo
8:27 am - 10:32 pm
UIO
-
STL
15h 05m
1 stop
$732American Airlines
Sat, Nov 14 - Sat, Nov 21
American Airlines Logo
5:00 am - 10:40 pm
STL
-
GYE
16h 40m
2 stops
American Airlines Logo
6:00 am - 12:05 am
GYE
-
STL
19h 05m
2 stops
$750American Airlines
Sat, Nov 14 - Sat, Nov 21
United Airlines Logo
11:15 am - 11:25 pm
STL
-
UIO
12h 10m
1 stop
United Airlines Logo
7:00 am - 6:04 pm
UIO
-
STL
11h 04m
1 stop
$754United Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
5:18 am - 10:37 pm
STL
-
GYE
17h 19m
1 stop
American Airlines Logo
6:00 am - 10:54 pm
GYE
-
STL
16h 54m
1 stop
$764American Airlines
Tue, Jul 21 - Tue, Jul 28
American Airlines Logo
6:00 am - 9:10 pm
STL
-
UIO
15h 10m
2 stops
American Airlines Logo
6:00 am - 10:55 pm
UIO
-
STL
16h 55m
2 stops
$767American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
9:44 am - 10:37 pm
STL
-
GYE
12h 53m
2 stops
American Airlines Logo
6:00 am - 9:48 pm
GYE
-
STL
15h 48m
2 stops
$769American Airlines
Tue, Jul 21 - Tue, Jul 28

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United Airlines flights from St. Louis to Ecuador

Our best United Airlines deals on St. Louis to Ecuador flight tickets
United Airlines
Oct 28
STL8:35 amLambert-St Louis
14h 55m
1 stop
UIO11:30 pmQuito Mariscal Sucr
Nov 10
UIO1:35 amQuito Mariscal Sucr
9h 30m
1 stop
STL10:05 amLambert-St Louis
$697
United Airlines
Nov 14
STL2:56 pmLambert-St Louis
8h 34m
1 stop
UIO12:30 amQuito Mariscal Sucr
Nov 20
UIO1:35 amQuito Mariscal Sucr
16h 04m
1 stop
STL4:39 pmLambert-St Louis
$727
United Airlines
Aug 11
STL11:15 amLambert-St Louis
12h 10m
1 stop
UIO11:25 pmQuito Mariscal Sucr
Aug 18
UIO7:00 amQuito Mariscal Sucr
11h 04m
1 stop
STL6:04 pmLambert-St Louis
$754

LATAM Airlines flights from St. Louis to Ecuador

Our best LATAM Airlines deals on St. Louis to Ecuador flight tickets
LATAM Airlines
Oct 28
STL5:30 pmLambert-St Louis
11h 28m
2 stops
UIO4:58 amQuito Mariscal Sucr
Nov 11
UIO7:00 pmQuito Mariscal Sucr
24h 01m
2 stops
STL6:01 pmLambert-St Louis
$667
LATAM Airlines
Jul 14
STL6:00 amLambert-St Louis
12h 59m
1 stop
UIO6:59 pmQuito Mariscal Sucr
Jul 16
UIO12:59 amQuito Mariscal Sucr
16h 54m
1 stop
STL5:53 pmLambert-St Louis
$922
LATAM Airlines
Jul 14
STL6:00 amLambert-St Louis
12h 59m
1 stop
UIO6:59 pmQuito Mariscal Sucr
Jul 17
UIO9:00 amQuito Mariscal Sucr
14h 53m
2 stops
STL11:53 pmLambert-St Louis
$927

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Ecuador 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 June 24, 2026.
Use the filters below to find and compare flights from St. Louis to Ecuador that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Wed 10/28

5:30 pm-4:58 am

2 stops11h 28m

Quito Mariscal Sucr

Wed 11/11

7:00 pm-6:01 pm

2 stops24h 01m

$667

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Wed 10/28

3:42 pm-4:58 am

2 stops13h 16m

Quito Mariscal Sucr

Tue 11/10

12:55 am-6:01 pm

1 stop18h 06m

$692

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Wed 10/28

8:35 am-11:30 pm

1 stop14h 55m

Quito Mariscal Sucr

Tue 11/10

1:35 am-10:05 am

1 stop9h 30m

$697

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sat 11/14

2:56 pm-12:30 am

1 stop8h 34m

Quito Mariscal Sucr

Fri 11/20

1:35 am-4:39 pm

1 stop16h 04m

$727

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sat 11/14

8:40 am-11:02 pm

2 stops13h 22m

Quito Mariscal Sucr

Sat 11/21

8:27 am-10:32 pm

1 stop15h 05m

$732

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Sat 11/14

5:00 am-10:40 pm

2 stops16h 40m

Guayaquil Jose Joaquin de Olmedo

Sat 11/21

6:00 am-12:05 am

2 stops19h 05m

$750
Quickest round-trip

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Tue 8/11

11:15 am-11:25 pm

1 stop12h 10m

Quito Mariscal Sucr

Tue 8/18

7:00 am-6:04 pm

1 stop11h 04m

$754

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Tue 7/21

5:18 am-10:37 pm

1 stop17h 19m

Guayaquil Jose Joaquin de Olmedo

Tue 7/28

6:00 am-10:54 pm

1 stop16h 54m

$764

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Tue 8/11

6:00 am-9:10 pm

2 stops15h 10m

Quito Mariscal Sucr

Tue 8/18

6:00 am-10:55 pm

2 stops16h 55m

$767

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Tue 7/21

9:44 am-10:37 pm

2 stops12h 53m

Guayaquil Jose Joaquin de Olmedo

Tue 7/28

6:00 am-9:48 pm

2 stops15h 48m

$769

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Ecuador from

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

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

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

You could potentially save up to 5% on your flight if you consider stops on a St. Louis to Ecuador flight.

Cheap St. Louis to Ecuador flight deals and tips

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

Fastest flight time

8h 59m

Direct flights

None
The fastest flight from St. Louis to Ecuador takes 8h 59m
There are no direct flights from St. Louis to Ecuador. There are no popular flight routes from St. Louis to Ecuador.
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Frequently asked questions about flying from St. Louis to Ecuador

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

    Prices for flights from Lambert-St Louis Airport to Ecuador were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Ecuador?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ecuador.

  • What documentation or ID do you need to fly to Ecuador?

    The necessary travel and health documents for your Ecuador 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.

Best airlines flying from St. Louis to Ecuador

Compare and see reviews for airlines that fly from St. Louis to Ecuador with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $516Free CancellationRating
7.1
11,751 reviews
Search American Airlines flights
DeltaPriceFrom $661Free CancellationRating
7.8
8,432 reviews
Search Delta flights

Why use momondo?

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

Finding the right flight to Ecuador from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ecuador quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Ecuador from St. Louis with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ecuador from St. Louis.

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

Yes. momondo can track prices for St. Louis to Ecuador flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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