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Cheap flights from St. Louis to Ecuador from $298

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ecuador departing on 1/1. 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
0 bags

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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
9:59 am - 9:35 pm
STL
-
UIO
10h 36m1 stop
LATAM Airlines Logo
11:45 pm - 8:53 am
UIO
-
STL
10h 08m1 stop
$625LATAM Airlines
Thu, Jan 15 - Fri, Jan 23
American Airlines Logo
6:52 am - 11:47 pm
STL
-
UIO
15h 55m2 stops
American Airlines Logo
12:45 am - 10:26 am
UIO
-
STL
10h 41m1 stop
$639American Airlines
Sun, Feb 1 - Sat, Feb 21
American Airlines Logo
6:20 pm - 1:30 pm
STL
-
GYE
19h 10m1 stop
American Airlines Logo
2:30 pm - 10:32 am
GYE
-
STL
20h 02m1 stop
$670American Airlines
Sat, Mar 28 - Sun, Apr 5
United Airlines Logo
6:00 am - 11:42 pm
STL
-
GYE
16h 42m2 stops
United Airlines Logo
12:20 pm - 10:00 pm
GYE
-
STL
34h 40m2 stops
$671United Airlines
Sat, Jan 24 - Wed, Jan 28
American Airlines Logo
5:05 am - 11:47 pm
STL
-
UIO
17h 42m1 stop
American Airlines Logo
12:45 am - 10:26 am
UIO
-
STL
10h 41m1 stop
$672American Airlines
Sun, Feb 1 - Sat, Feb 21
American Airlines Logo
6:53 pm - 1:30 pm
STL
-
GYE
18h 37m2 stops
American Airlines Logo
2:30 pm - 10:32 am
GYE
-
STL
20h 02m1 stop
$674American Airlines
Sat, Mar 28 - Sun, Apr 5
American Airlines Logo
6:52 am - 11:47 pm
STL
-
UIO
15h 55m2 stops
American Airlines Logo
12:45 am - 12:31 pm
UIO
-
STL
12h 46m2 stops
$676American Airlines
Sun, Feb 1 - Sat, Feb 21
LATAM Airlines Logo
9:59 am - 5:17 am
STL
-
UIO
42h 18m2 stops
LATAM Airlines Logo
11:45 pm - 8:53 am
UIO
-
STL
10h 08m1 stop
$681LATAM Airlines
Thu, Jan 15 - Fri, Jan 23
Delta Logo
9:59 am - 2:05 pm
STL
-
UIO
27h 06m2 stops
Delta Logo
11:45 pm - 8:53 am
UIO
-
STL
10h 08m1 stop
$699Delta
Sat, Jan 31 - Wed, Feb 4
United Airlines Logo
4:49 pm - 12:30 am
STL
-
UIO
30h 41m2 stops
United Airlines Logo
1:35 am - 9:13 pm
UIO
-
STL
20h 38m2 stops
$703United Airlines
Sat, Jan 31 - Tue, Feb 3

United Airlines flights from St. Louis to Ecuador

Our best United Airlines deals on St. Louis to Ecuador flight tickets
United Airlines
Jan 24
STL6:00 amLambert-St Louis
13h 46m
2 stops
GYE8:46 pmGuayaquil Jose Joaquin de Olmedo
Jan 28
GYE12:20 pmGuayaquil Jose Joaquin de Olmedo
28h 32m
2 stops
STL3:52 pmLambert-St Louis
$671
Find similar
United Airlines
Jan 31
STL4:49 pmLambert-St Louis
30h 41m
2 stops
UIO12:30 amQuito Mariscal Sucr
Feb 3
UIO1:35 amQuito Mariscal Sucr
20h 38m
2 stops
STL9:13 pmLambert-St Louis
$703
Find similar
United Airlines
Jan 31
STL4:42 pmLambert-St Louis
30h 48m
1 stop
UIO12:30 amQuito Mariscal Sucr
Feb 3
UIO1:35 amQuito Mariscal Sucr
15h 17m
1 stop
STL3:52 pmLambert-St Louis
$708
Find similar

American Airlines flights from St. Louis to Ecuador

Our best American Airlines deals on St. Louis to Ecuador flight tickets
American Airlines
Feb 1
STL6:52 amLambert-St Louis
15h 55m
2 stops
UIO11:47 pmQuito Mariscal Sucr
Feb 21
UIO12:45 amQuito Mariscal Sucr
10h 41m
1 stop
STL10:26 amLambert-St Louis
$639
Find similar
American Airlines
Mar 28
STL6:20 pmLambert-St Louis
19h 10m
1 stop
GYE1:30 pmGuayaquil Jose Joaquin de Olmedo
Apr 5
GYE2:30 pmGuayaquil Jose Joaquin de Olmedo
20h 02m
1 stop
STL10:32 amLambert-St Louis
$670
Find similar
American Airlines
Feb 1
STL5:05 amLambert-St Louis
17h 42m
1 stop
UIO11:47 pmQuito Mariscal Sucr
Feb 21
UIO12:45 amQuito Mariscal Sucr
10h 41m
1 stop
STL10:26 amLambert-St Louis
$672
Find similar

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 December 4, 2025.
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

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Thu 1/15

9:59 am-9:35 pm

1 stop10h 36m

Quito Mariscal Sucr

Fri 1/23

11:45 pm-8:53 am

1 stop10h 08m

$625

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sun 2/1

6:52 am-11:47 pm

2 stops15h 55m

Quito Mariscal Sucr

Sat 2/21

12:45 am-10:26 am

1 stop10h 41m

$639

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Sat 3/28

6:20 pm-1:30 pm

1 stop19h 10m

Guayaquil Jose Joaquin de Olmedo

Sun 4/5

2:30 pm-10:32 am

1 stop20h 02m

$670

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Sat 1/24

6:00 am-11:42 pm

2 stops16h 42m

Guayaquil Jose Joaquin de Olmedo

Wed 1/28

12:20 pm-10:00 pm

2 stops34h 40m

$671

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sun 2/1

5:05 am-11:47 pm

1 stop17h 42m

Quito Mariscal Sucr

Sat 2/21

12:45 am-10:26 am

1 stop10h 41m

$672

St. LouisGuayaquil

STL - GYE

STLGYE

Lambert-St Louis

Sat 3/28

6:53 pm-1:30 pm

2 stops18h 37m

Guayaquil Jose Joaquin de Olmedo

Sun 4/5

2:30 pm-10:32 am

1 stop20h 02m

$674

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sun 2/1

6:52 am-11:47 pm

2 stops15h 55m

Quito Mariscal Sucr

Sat 2/21

12:45 am-12:31 pm

2 stops12h 46m

$676

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Thu 1/15

9:59 am-5:17 am

2 stops42h 18m

Quito Mariscal Sucr

Fri 1/23

11:45 pm-8:53 am

1 stop10h 08m

$681

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sat 1/31

9:59 am-2:05 pm

2 stops27h 06m

Quito Mariscal Sucr

Wed 2/4

11:45 pm-8:53 am

1 stop10h 08m

$699

St. LouisQuito

STL - UIO

STLUIO

Lambert-St Louis

Sat 1/31

4:49 pm-12:30 am

2 stops30h 41m

Quito Mariscal Sucr

Tue 2/3

1:35 am-9:13 pm

2 stops20h 38m

$703

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 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

What is the cheapest day to depart on your flight to Ecuador?

The cheapest day to depart from St. Louis to Ecuador is on a Tuesday. Travelers who choose to depart for Ecuador on a Tuesday will often find tickets for as low as $549. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $862. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ecuador.

What is the cheapest time of day to depart on your flight to Ecuador?

Flying to Ecuador from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $656 when looking at flights departing in the afternoon. Flights to Ecuador are more costly in the morning, with an average ticket price of $689. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You could potentially save up to 6% 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

10h 36m

Direct flights

None
The fastest flight from St. Louis to Ecuador takes 10h 36m
There are no direct flights from St. Louis to Ecuador. There are no popular flight routes from St. Louis to Ecuador.
Search flight deals

  • 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
7.2
11,043 reviews
Search American Airlines flights
United AirlinesPriceFrom $634Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
DeltaPriceFrom $661Free CancellationRating
7.9
8,011 reviews
Search Delta flights
LATAM AirlinesPriceFrom $664Free CancellationRating
7.5
1,889 reviews
Search LATAM Airlines 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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