Find Cheap Flights from Seattle/Tacoma Intl to Lambert-St Louis (SEA - STL)

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Fri 1/19
Fri 1/26
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Good to Know

Low Season:
February
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
9%
expected price increase
Average Price:
$394
(avg. price over the last 2 weeks)
Good Deal:
$285
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Lambert-St Louis

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 $284 or less.
The cheapest flight from Seattle/Tacoma Intl to Lambert-St Louis was found 28 days before departure, on average.
Book at least 2 weeks 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 16% more expensive 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 Seattle/Tacoma Intl to Lambert-St Louis Flights

How long does a flight from Seattle/Tacoma Intl to Lambert-St Louis take?
An average nonstop flight takes 3h 45m, covering a distance of 1705 miles.
How many flights are there between Seattle/Tacoma Intl and Lambert-St Louis?
There are 46 (nonstop) flights between Seattle/Tacoma Intl and Lambert-St Louis per week, averaging 6 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Lambert-St Louis?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($238), Multiple Airlines ($268) and Alaska Airlines ($317).
Do I need a passport to fly between Seattle/Tacoma Intl and Lambert-St Louis?
No.
Which airlines fly most frequently between Seattle/Tacoma Intl and Lambert-St Louis?
Alaska Airlines (5 times daily), Southwest (1 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Seattle/Tacoma Intl to Lambert-St Louis?
For Seattle/Tacoma Intl to Lambert-St Louis, Friday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Lambert-St Louis back to Seattle/Tacoma Intl, the best deals are generally found on Saturday, with Friday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Lambert-St Louis (round-trip)

Airports
Origin
Seattle
$238
only
$238
Destination
St. Louis
$238
only
$238
Fri, Jan 19
SEA
STL
19h 16m
Sun, Jan 21
STL
SEA
23h 47m
Trip: 3 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
GRR
MCO
Excellent 10.0

Early departure. Non stop. Early arrival. Ease of travel.

ISP
TPA
Mediocre 2.3

In flight crew was cordial, warm, professional

Everything else was a sh*tshow: bad information, confused and angry employees, flight was 7-hours late

LAX
DEN
Excellent 8.0

Time management

Service

MCO
OMA
Excellent 8.0

Nice flight. No issues. Flight staff was great.

Front desk check in guy in Orlando was a bit shady. Asked that we pay for our check-in bags with cash and wanted 10$ cash to put our seats together. I did not give him cash and had to ask for a reciept for the checked bags. We were 4 hours early for check in.

ATL
LAS
Good 6.0

The crew was very friendly.

The seats were close together and not very comfortable. No entertainment, for example a movie for a 4 hour flight. You have to pay for everything. Only thing complimentary is water.

Tue, Apr 24
SEA
STL
12h 29m
Tue, May 1
STL
SEA
18h 58m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Feb 8
SEA
STL
3h 45m
Sun, Feb 11
STL
SEA
4h 45m
Trip: 4 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 66 reviews
Overall
8.6
Boarding
8.7
Comfort
8.4
Crew
8.9
Entertainment
7.9
Food
8.0
SEA
STL
Excellent 10.0

i got a good window seat

didnt like the hour delay, but what can you do

SEA
STL
Excellent 9.3

I did not eat on flight , just had the drink that was offered. Also did not use the entertainment offered. It was nice that both were available.

SEA
STL
Excellent 10.0

I love the boarding process. It only makes sense to board the back of the plane first. Finally! They have nice size overhead bins. Love the charging ports in the back of the seats. It seems like someone finally thought through the flight process. Even with a little turbulence the landing was smooth and just a little early.

Not their fault, but not a fan of long layovers. Anything over an hour to an hour and a half is a pain.

SEA
STL
Excellent 9.6

Loved the charging ports..My fruit and cheese tray was actually fabulous. Boarding was done fairly quickly and we even left a few minutes early.

SEA
STL
Excellent 10.0

I did not feel well on this flight and had a great experience. The crew was very helpful and kind and attended to my needs.

Thu, Jun 7
SEA
STL
6h 54m
Sat, Jun 16
STL
SEA
9h 30m
Trip: 10 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53827 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
EWR
SJO
Mediocre 2.0

Más espacio, al menos una película que ver, y algún bocadillo por ser un vuelo de tantas horas

IAD
FRA
Good 7.0

One of the stewardess was very kind

The longer leg from US to Frankfurt was very difficult to sleep in because the mid cabin section light was not turned off

IAH
PNS
Mediocre 2.0

delayed in piecemeal by 6 hrs before move to another gate. than mechanical delay and then cancelled. Arrived at hotel after midnight without food or drink. Substitute flight was next day noon - original offer was for late afternoon flight! That flight had poor service. Attendant dawdled so there were no drinks served.

SAN
SFO
Excellent 10.0

The flight actually left.

Poor communication. Flight originally at 11:35, then 12:05, then 12:15... At 11:55, they said they would start boarding in 20 min. How can you do that and still take off at 12:15? Answer: you can't. Just be honest and keep us informed. Bonus: United sent me an email saying that connection had already left (it hadn't - thanks United! - awesome service as always!)

BOI
DEN
Mediocre 3.6

I found the reason for being late to be questionable They said heavy snow but as i flew in i looked out the window and saw all roads nicely cleared That does not happen in 3 hours

They did not get my liggage to the connecting flight And here i am in Ukraine with no winter clothes at 7 below 3 days later

Wed, Apr 25
SEA
STL
11h 50m
Sun, Apr 29
STL
SEA
16h 09m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
DCA
Excellent 8.0

Time management

Service

GRR
MCO
Excellent 10.0

Early departure. Non stop. Early arrival. Ease of travel.

DEN
RNO
Excellent 8.6

Easy flight with good price.

No one takes cash anymore! Have to pay for all snacks! Not alot of room for broad shoulders.

IAD
MCO
Mediocre 2.0

Unorganized, confusing boarding, confusion with seating, unbelievable lines while checking bags. Literally the only redeeming factor was the price.

ISP
TPA
Mediocre 2.3

In flight crew was cordial, warm, professional

Everything else was a sh*tshow: bad information, confused and angry employees, flight was 7-hours late

Sat, Jun 2
SEA
STL
11h 48m
Wed, Jun 6
STL
SEA
9h 46m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
DCA
Excellent 8.0

Time management

Service

IAD
MCO
Mediocre 2.0

Unorganized, confusing boarding, confusion with seating, unbelievable lines while checking bags. Literally the only redeeming factor was the price.

ATL
TTN
Excellent 9.3

I was having a terrible migraine and one of the female on flight staff directed me to open seats where I could lay down. She also provided me with lots of water and a bag of ice!

DEN
RNO
Excellent 8.6

Easy flight with good price.

No one takes cash anymore! Have to pay for all snacks! Not alot of room for broad shoulders.

MKE
PHX
Mediocre 3.0

Service was awful. Delayed for more than 8hrs without an explanation of what type of maintenance issues were happening. Never given a straight answer as to what was happening. Food vouchers were only offered after the airport restaurants had closed. Once the plane was finished the crew had timed out and we could not leave till the following afternoon. Ended up being put up in a hotel for the night and lost an entire day of our weekend get away. Poor contingency planning on frontiers part. There was no reason

Thu, Mar 15
SEA
STL
11h 51m
Sat, Mar 17
STL
SEA
10h 03m
Trip: 3 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Mar 17
SEA
STL
3h 55m
Sat, Mar 24
STL
SEA
4h 30m
Trip: 8 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 66 reviews
Overall
8.6
Boarding
8.7
Comfort
8.4
Crew
8.9
Entertainment
7.9
Food
8.0
SEA
STL
Excellent 9.3

I did not eat on flight , just had the drink that was offered. Also did not use the entertainment offered. It was nice that both were available.

SEA
STL
Excellent 8.0

the digital boarding pass is great. The food tasted good but was costly.

it was hot on the plane. a 4 hour flight and you have to pay for food?

SEA
STL
Excellent 10.0

I love the boarding process. It only makes sense to board the back of the plane first. Finally! They have nice size overhead bins. Love the charging ports in the back of the seats. It seems like someone finally thought through the flight process. Even with a little turbulence the landing was smooth and just a little early.

Not their fault, but not a fan of long layovers. Anything over an hour to an hour and a half is a pain.

SEA
STL
Excellent 10.0

i got a good window seat

didnt like the hour delay, but what can you do

SEA
STL
Excellent 10.0

Punctual, professional and comfortable. This airline has never disappointed me. I appreciate the seat availability and the staff are always so very pleasant. Well done.

My return flight has a child seated behind me. Not great.

Fri, Jun 15
SEA
STL
11h 48m
Tue, Jun 19
STL
SEA
16h 09m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
RNO
Excellent 8.6

Easy flight with good price.

No one takes cash anymore! Have to pay for all snacks! Not alot of room for broad shoulders.

ATL
LAS
Good 6.0

The crew was very friendly.

The seats were close together and not very comfortable. No entertainment, for example a movie for a 4 hour flight. You have to pay for everything. Only thing complimentary is water.

IAD
MCO
Mediocre 2.0

Unorganized, confusing boarding, confusion with seating, unbelievable lines while checking bags. Literally the only redeeming factor was the price.

MCO
OMA
Excellent 8.0

Nice flight. No issues. Flight staff was great.

Front desk check in guy in Orlando was a bit shady. Asked that we pay for our check-in bags with cash and wanted 10$ cash to put our seats together. I did not give him cash and had to ask for a reciept for the checked bags. We were 4 hours early for check in.

GRR
MCO
Excellent 10.0

Early departure. Non stop. Early arrival. Ease of travel.

Tue, Jul 17
SEA
STL
6h 22m
Wed, Jul 25
STL
SEA
9h 43m
Trip: 9 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
OMA
MCO
Excellent 8.0

Nice flight. Arrived early.

4.99 for a can of coke???

IAD
MCO
Mediocre 2.0

Unorganized, confusing boarding, confusion with seating, unbelievable lines while checking bags. Literally the only redeeming factor was the price.

ATL
TTN
Excellent 9.3

I was having a terrible migraine and one of the female on flight staff directed me to open seats where I could lay down. She also provided me with lots of water and a bag of ice!

LAX
DEN
Excellent 8.0

Time management

Service

MIA
LGA
Mediocre 2.0

if you have a hard engagement that you have to make, i hate to say it, but use a bigger airline. These guys are not dependable nyc -> miami. Have had 2 flights cancelled and delayed over 6 hours in the last 6 months. Only one scheduled flight everyday. If you can risk it, fine, but otherwise not worth it.

Fri, Jul 20
SEA
STL
12h 27m
Fri, Aug 10
STL
SEA
12h 44m
Trip: 22 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 33581 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ISP
TPA
Mediocre 2.3

In flight crew was cordial, warm, professional

Everything else was a sh*tshow: bad information, confused and angry employees, flight was 7-hours late

MIA
LGA
Mediocre 2.0

if you have a hard engagement that you have to make, i hate to say it, but use a bigger airline. These guys are not dependable nyc -> miami. Have had 2 flights cancelled and delayed over 6 hours in the last 6 months. Only one scheduled flight everyday. If you can risk it, fine, but otherwise not worth it.

ATL
LAS
Good 6.0

The crew was very friendly.

The seats were close together and not very comfortable. No entertainment, for example a movie for a 4 hour flight. You have to pay for everything. Only thing complimentary is water.

GRR
MCO
Excellent 10.0

Early departure. Non stop. Early arrival. Ease of travel.

DEN
DCA
Excellent 8.0

Time management

Service

Show more results

Seattle/Tacoma Intl to Lambert-St Louis Flight Information

Avg. Flight Duration 4h 13m
Flights Arrive in Lambert-St Louis
Flights Depart from Seattle/Tacoma Intl
Flight Price $238
Distance 1705 miles
Airlines Frontier, Alaska Airlines, United
*
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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.