Find Cheap Flights from Lambert-St Louis to San Juan Luis Munoz Marin International (STL - SJU)

Search hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin International

Wed 1/17
Wed 1/24
Any month
Compare vs. KAYAK |

Good to Know

Low Season:
February
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
13%
expected price increase
Average Price:
$459
(avg. price over the last 2 weeks)
Good Deal:
$353
or less (round trip)

When to Book Flights from Lambert-St Louis to San Juan Luis Munoz Marin International

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $353 or less.
The cheapest flight from Lambert-St Louis to San Juan Luis Munoz Marin International was found 1 day before departure, on average.
Book at least 1 week before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is February.
Morning departure is around 11% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Lambert-St Louis to San Juan Luis Munoz Marin International Flights

How long does a flight from Lambert-St Louis to San Juan Luis Munoz Marin International take?
An average nonstop flight takes 6h 12m, covering a distance of 2025 miles.
Which airlines provide the cheapest flights from Lambert-St Louis to San Juan Luis Munoz Marin International?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($279), Delta ($286) and American Airlines ($309).
Do I need a passport to fly between Lambert-St Louis and San Juan Luis Munoz Marin International?
Yes.
What’s the cheapest day of the week to fly Lambert-St Louis to San Juan Luis Munoz Marin International?
For Lambert-St Louis to San Juan Luis Munoz Marin International, Wednesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from San Juan Luis Munoz Marin International back to Lambert-St Louis, the best deals are generally found on Thursday, with Sunday being the most expensive.

Book cheap flights from Lambert-St Louis to San Juan Luis Munoz Marin International (round-trip)

Airports
Origin
St. Louis
$279
only
$279
Destination
San Juan
$279
only
$279
Wed, Feb 28
STL
SJU
14h 34m
Tue, Mar 13
SJU
STL
6h 28m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Feb 9
STL
SJU
7h 35m
Fri, Feb 16
SJU
STL
8h 31m
Trip: 8 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15207 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
SEA
ANC
Excellent 10.0

Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!

Nothing.

BOS
MKE
Excellent 10.0

Direct flight, on time, friendly crew, smooth flight

JFK
CMH
Excellent 9.6

Always nice to be on an American plane out of an American airport.....SO much more professional. :))

CUN
MSY
Good 7.0

The outbound crew was terrific. The flight itself was fine. We even arrived early.

Upon deplaning in Cancun, ALL passengers are put on a bus and driven far away from the terminals to an arrivals area. Those of us with connecting flights are royally f*cked at that point, especially if your connection is short, as mine was. The so-called shuttle to the departure terminals, which are entire kilometers away, was to arrive in like half an hour. HALF AN HOUR. Who has this time to spare?? The alternative to the shuttle is paying a taxi that charges a hefty fare--and God help you if you don't have cash. The departures terminal was swamped and only thru begging assistance and line cuts did I make my connection...and then only by the skin of my teeth. It was a complete nightmare.

LAX
CUN
Mediocre 2.6

Terrible customer service both on the phone before the flight, but Especially from the gate agent. Wow she was really horrible.

The flight attendants on board were good! They helped get everything straight. Easily could have been handled by the incompetent gate agent. Wow.

Tue, Jun 12
STL
SJU
8h 35m
Wed, Jun 20
SJU
STL
8h 39m
Trip: 9 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27225 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
BNA
LAX
Excellent 10.0

The service from the flight attendants on the flight was absolutely amazing

DFW
YYZ
Okay 4.6

Lucked out with extra legroom seat. Seat was broken though.

The whole customs process is a seemingly endless mess.

MXP
JFK
Okay 5.0

i had a really horrible experience with a flight attendent but the 2 in my cabin were great. Earphones didnt work and couldnt see screen

PHL
ORD
Mediocre 2.0

The baggage customer service said the crew will wait for us, but they never did. THANKS for NOTHING!

DFW
COS
Excellent 10.0

Great service

Sun, Mar 4
STL
SJU
7h 29m
Wed, Apr 4
SJU
STL
8h 23m
Trip: 31 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15207 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
TUS
SEA
Excellent 10.0

Delta did a really good job as always. Cheaper, more comfortable, and a WAY better experience than Alaska Airlines.

Nothing.

HOU
ATL
Excellent 10.0

Service

CUN
MSY
Good 7.0

The outbound crew was terrific. The flight itself was fine. We even arrived early.

Upon deplaning in Cancun, ALL passengers are put on a bus and driven far away from the terminals to an arrivals area. Those of us with connecting flights are royally f*cked at that point, especially if your connection is short, as mine was. The so-called shuttle to the departure terminals, which are entire kilometers away, was to arrive in like half an hour. HALF AN HOUR. Who has this time to spare?? The alternative to the shuttle is paying a taxi that charges a hefty fare--and God help you if you don't have cash. The departures terminal was swamped and only thru begging assistance and line cuts did I make my connection...and then only by the skin of my teeth. It was a complete nightmare.

MSY
JFK
Excellent 10.0

The overhead bin did not stay down low enough so that I could place my bag in. It would lower then before I could place my bag raise slightly by a few inches. For someone of my height (5’5”) that was problematic. Fortunately another passenger saw my dilemma and held the bin lower to its full opening capacity. This also momentarily slowed down the boarding process.

JFK
CMH
Excellent 9.6

Always nice to be on an American plane out of an American airport.....SO much more professional. :))

Thu, Mar 1
STL
SJU
7h 57m
Fri, Mar 9
SJU
STL
8h 25m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 4
STL
SJU
6h 22m
Thu, May 10
SJU
STL
9h 08m
Trip: 37 days
Overall 0.0 Poor
Based on 0 reviews
Tue, May 22
STL
SJU
9h 24m
Wed, May 30
SJU
STL
11h 44m
Trip: 9 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27225 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
DFW
YYZ
Okay 4.6

Lucked out with extra legroom seat. Seat was broken though.

The whole customs process is a seemingly endless mess.

PHL
ORD
Mediocre 2.0

The baggage customer service said the crew will wait for us, but they never did. THANKS for NOTHING!

PHL
MAN
Excellent 8.0

Efficient crew

Very full no isle seat!

BNA
LAX
Excellent 10.0

The service from the flight attendants on the flight was absolutely amazing

CLT
LHR
Excellent 10.0

Departure and arrival time

Nothing

Mon, Jun 11
STL
SJU
6h 12m
Sat, Jun 16
SJU
STL
9h 05m
Trip: 6 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15207 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
JFK
CMH
Excellent 9.6

Always nice to be on an American plane out of an American airport.....SO much more professional. :))

YUL
DTW
Mediocre 2.0

Not applied

Not applied

HOU
ATL
Excellent 10.0

Service

LAX
CUN
Mediocre 2.6

Terrible customer service both on the phone before the flight, but Especially from the gate agent. Wow she was really horrible.

The flight attendants on board were good! They helped get everything straight. Easily could have been handled by the incompetent gate agent. Wow.

SEA
ANC
Excellent 10.0

Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!

Nothing.

Thu, Jan 18
STL
SJU
16h 50m
Mon, Jan 22
SJU
STL
8h 52m
Trip: 5 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53752 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
RDU
Excellent 10.0

The efficiency and professionalism was excellent. Both legs of my trip went great!

MEX
DEN
Okay 5.0

We did get to our destination.

Flight was late, as always. I couldn’t sit with my spouse. Rows are so tight, one can barely get in/out and we are smaller than normal size. Baggage fees make overhead compartment loading a real nightmare. I wonder what they will think of next to make flying an even more terrible experience.

SFO
DCA
Good 6.0

Good service from crew. Fairly quick boarding process.

Aircraft seemed fairly new on inside, but didn't have power outlets. Small uncomfortable seats on a long flight that is almost always full.

AUS
IAH
Mediocre 2.0

N/a

There was a name change needed for the flight..they weren’t able to support that at all resulting me cancelling the flight.

SFO
MEX
Excellent 10.0

As expected.

No

Fri, Jul 6
STL
SJU
6h 37m
Sat, Jul 14
SJU
STL
6h 20m
Trip: 9 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15207 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
SYR
JFK
Good 7.0

Nothing Special

SEA
ANC
Excellent 10.0

Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!

Nothing.

DEN
SLC
Excellent 10.0

Delta is great

TUS
SEA
Excellent 10.0

Delta did a really good job as always. Cheaper, more comfortable, and a WAY better experience than Alaska Airlines.

Nothing.

SAN
LAX
Excellent 10.0

on time

Sun, May 20
STL
SJU
14h 52m
Sun, May 27
SJU
STL
6h 24m
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27225 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
FCO
PHL
Okay 4.3

Not much.

The flight was late due to maintenance and caused us to miss our connecting flight to Chicago. American Airlines customer assistance at the airport was absolutely terrible. They were rude and inconsiderate as they kept suggesting to fly standby. We shouldn't have to fly standby when it wasn't our fault why were late. They told us our bags would be ok going to Chicago and they we would make the flight, but we did not. I do not know why didn't wait for us considering there were 8 others that also missed the connecting flight. We had to fly to Denver and stay overnight with no luggage and catch a 7:00am flight to Chicago. The last surprise I received was my damaged bag when I got back to Chicago. Thank you for making this trip memorable in a terrible way. I will never book or recommend Kayak or use American Airlines again.

BNA
LAX
Excellent 10.0

The service from the flight attendants on the flight was absolutely amazing

MXP
JFK
Okay 5.0

i had a really horrible experience with a flight attendent but the 2 in my cabin were great. Earphones didnt work and couldnt see screen

PHL
LHR
Good 7.3

Range of entertainment options, one crew member was terrific

Comfort of bed, some crew members snarky, old aircraft

GDL
DFW
Good 6.3

Friendly staff

Food was terrible and the seats tight

Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.

Lambert-St Louis to San Juan Luis Munoz Marin International Flight Information

Flights Arrive in San Juan Luis Munoz Marin International
Flights Depart from Lambert-St Louis
Flight Price $279
Distance 2025 miles
Airlines Delta, American Airlines, United