Find Cheap Flights from Baltimore/Washington to Lambert-St Louis (BWI - STL)

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Good to Know

Low Season:
November
Best time to beat the crowds
2%
expected price decrease
High Season:
April
Most popular time to fly
10%
expected price increase
Average Price:
$346
(avg. price over the last 2 weeks)
Good Deal:
$273
or less (round trip)

When to Book Flights from Baltimore/Washington 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 $273 or less.
The cheapest flight from Baltimore/Washington to Lambert-St Louis was found 65 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 March, April and May. The cheapest month to fly is November.
Morning departure is around 29% 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 Baltimore/Washington to Lambert-St Louis Flights

How long does a flight from Baltimore/Washington to Lambert-St Louis take?
An average nonstop flight takes 4h 04m, covering a distance of 736 miles.
How many flights are there between Baltimore/Washington and Lambert-St Louis?
There are 24 (nonstop) flights between Baltimore/Washington and Lambert-St Louis per week, averaging 3 per day.
Which airlines provide the cheapest flights from Baltimore/Washington to Lambert-St Louis?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($191), American Airlines ($237) and Delta ($250).
Do I need a passport to fly between Baltimore/Washington and Lambert-St Louis?
No.
Which airlines fly most frequently between Baltimore/Washington and Lambert-St Louis?
Southwest (3 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Baltimore/Washington to Lambert-St Louis?
For Baltimore/Washington to Lambert-St Louis, Saturday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Lambert-St Louis back to Baltimore/Washington, the best deals are generally found on Wednesday, with Sunday being the most expensive.

Book cheap flights from Baltimore/Washington to Lambert-St Louis (round-trip)

Airports
Origin
Baltimore
$191
only
$191
Destination
St. Louis
$191
only
$191
Sat, Mar 10
BWI
STL
4h 04m
Wed, Mar 14
STL
BWI
12h 07m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Feb 12
BWI
STL
6h 37m
Tue, Feb 13
STL
BWI
4h 44m
Trip: 2 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
DFW
BMI
Mediocre 3.6

I didn’t make this flight.

MIA
DCA
Excellent 10.0

New plane, 737-Max. More fuel efficient, quieter, more in-cabin luggage storage.

Seats don’t decline as much.

DFW
GEG
Excellent 8.0

Food could have been better. Plane was 1/2 full. WiFi was not giving all the movies. Only 6 or 7 to choose from.

MAD
PHL
Mediocre 2.0

Missed it!

NAS
MIA
Mediocre 2.0

We had to wait almost two hrs on the plane before take off.

Sun, Feb 18
BWI
STL
4h 30m
Sat, Feb 24
STL
BWI
4h 29m
Trip: 7 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 15315 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

BOS
AUS
Good 6.0

Delayed so I was not home until middle of the night.

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

LIM
ATL
Excellent 8.0

The crew, food, plane, everything was excellent

ATL
HOU
Excellent 10.0

Nice flight and good staff and service

Sat, Mar 24
BWI
STL
4h 49m
Fri, Mar 30
STL
BWI
6h 55m
Trip: 7 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53853 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
AMS
Mediocre 2.0

I didn't go. It was $400 just to change my name on my ticket from my maiden name to my married name. I am so disappointed and will never use Kayak again!!!

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!)

ORD
BNA
Excellent 10.0

Everything

IAD
BRU
Excellent 8.3

Very friendly cabin crew made this trip pleasant and entertaining.

Despite plenty of empty seats, the ground personnel would not consider changing our seat assignment at the gate to allow us to sit together.

MCO
IAH
Mediocre 3.0

Flight was cancelled on our way back home from Gudalajara, was speaking to a representative for almost 2 hours to get me on the next flight the flight representative forgot to put me on hold and told everyone how rude i was, i was not rude i was just trying to get home. The representative couldn’t help me so i asked to be transferred to a manager, after 2 hours i was transferred and the manager hung the phone up. Long story short i called back spoke to another manager Yana and she was the rudest lady ever! She basically told me for waiting to long i will have to be placed on a flight 2 days after my cancellation flight. I started to cry because i needed to be home and she basically did not care so i took the date. Never again and i will warn everyone about this airline and their customer service!

Mon, Apr 16
BWI
STL
6h 03m
Tue, Apr 17
STL
BWI
9h 50m
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Apr 5
BWI
STL
4h 15m
Mon, Apr 9
STL
BWI
4h 15m
Trip: 5 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
SFO
LAX
Excellent 10.0

great flight

ORD
PHL
Mediocre 2.0

Nothing - the flight from Chicago to Philadelphia was delayed by about 2 hours. Luckily, was able to get the flight switched to a Chicago - London direct flight.

The connecting flight from Philadelphia to Manchester would've been missed. So, American Airlines booked the same flight for 24 hours later. Luckily, they offered a different flight. Due to the flight changes, the prepaid ground transportation from Manchester to Leeds wasn't used. Transportation from London to Leeds had to be purchased at a much greater additional expense.

DFW
BMI
Mediocre 3.6

I didn’t make this flight.

SLC
CLT
Okay 4.0

Flight attendants

The flight got delayed from salt lake and we had to spend a day in Charlotte before another flight came

DFW
GEG
Excellent 8.0

Food could have been better. Plane was 1/2 full. WiFi was not giving all the movies. Only 6 or 7 to choose from.

Tue, Jan 30
BWI
STL
8h 26m
Wed, Jan 31
STL
BWI
12h 20m
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 3
BWI
STL
6h 06m
Sat, May 5
STL
BWI
4h 16m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
MAD
PHL
Good 7.0

Flight was not full.

Luggage was very late and arrived at the wrong carousel.

SFO
LAX
Excellent 10.0

great flight

DFW
GEG
Excellent 8.0

Food could have been better. Plane was 1/2 full. WiFi was not giving all the movies. Only 6 or 7 to choose from.

DFW
BMI
Mediocre 3.6

I didn’t make this flight.

NAS
MIA
Mediocre 2.0

We had to wait almost two hrs on the plane before take off.

Sat, May 12
BWI
STL
4h 48m
Wed, May 16
STL
BWI
4h 12m
Trip: 5 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
ORD
PHL
Mediocre 2.0

Nothing - the flight from Chicago to Philadelphia was delayed by about 2 hours. Luckily, was able to get the flight switched to a Chicago - London direct flight.

The connecting flight from Philadelphia to Manchester would've been missed. So, American Airlines booked the same flight for 24 hours later. Luckily, they offered a different flight. Due to the flight changes, the prepaid ground transportation from Manchester to Leeds wasn't used. Transportation from London to Leeds had to be purchased at a much greater additional expense.

DFW
BMI
Mediocre 3.6

I didn’t make this flight.

SNA
DFW
Mediocre 3.6

We were unfortunately stuck on the tarmac for 45 minutes. I ran to my connecting gate but they had already closed it. There wasn’t a service rep at the gate. I walked to another gate and there was a very helpful rep who rebooked me to a nearby city. It overall was disappointing and caused me to get home about 3 1/2 hours later.

DFW
PHL
Mediocre 3.0

They separated my bags, so I had to wait in Philadelphia for my bag to arrive on next flight 2 1/2 hours latter. Not happy after flying from Sydney.

NAS
MIA
Mediocre 2.0

We had to wait almost two hrs on the plane before take off.

Fri, Mar 2
BWI
STL
4h 46m
Sun, Mar 4
STL
BWI
4h 44m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
SNA
DFW
Mediocre 3.6

We were unfortunately stuck on the tarmac for 45 minutes. I ran to my connecting gate but they had already closed it. There wasn’t a service rep at the gate. I walked to another gate and there was a very helpful rep who rebooked me to a nearby city. It overall was disappointing and caused me to get home about 3 1/2 hours later.

MAD
PHL
Mediocre 2.0

Missed it!

DFW
PHL
Mediocre 3.0

They separated my bags, so I had to wait in Philadelphia for my bag to arrive on next flight 2 1/2 hours latter. Not happy after flying from Sydney.

LGA
CLT
Excellent 10.0

We had two medical emergency on board so the flight attendant took care of them really well

They check in my hand carry my whole point of carrying is not to be bother with claing my luggage

MIA
DCA
Excellent 10.0

New plane, 737-Max. More fuel efficient, quieter, more in-cabin luggage storage.

Seats don’t decline as much.

Wed, Jul 18
BWI
STL
5h 57m
Tue, Jul 31
STL
BWI
4h 01m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Jun 14
BWI
STL
6h 19m
Mon, Jun 18
STL
BWI
6h 03m
Trip: 5 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 27334 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
MAD
PHL
Mediocre 2.0

Missed it!

DFW
BMI
Mediocre 3.6

I didn’t make this flight.

DFW
GEG
Excellent 8.0

Food could have been better. Plane was 1/2 full. WiFi was not giving all the movies. Only 6 or 7 to choose from.

SNA
DFW
Mediocre 3.6

We were unfortunately stuck on the tarmac for 45 minutes. I ran to my connecting gate but they had already closed it. There wasn’t a service rep at the gate. I walked to another gate and there was a very helpful rep who rebooked me to a nearby city. It overall was disappointing and caused me to get home about 3 1/2 hours later.

SLC
CLT
Okay 4.0

Flight attendants

The flight got delayed from salt lake and we had to spend a day in Charlotte before another flight came

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Baltimore/Washington to Lambert-St Louis Flight Information

Flights Arrive in Lambert-St Louis
Flights Depart from Baltimore/Washington
Flight Price $191
Distance 736 miles
Airlines American Airlines, Delta, United
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.