Find Cheap Flights from Lambert-St Louis to Phoenix Sky Harbor Intl (STL - PHX)

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Thu 11/23
Thu 11/30
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Good to Know

Low Season:
January
Best time to beat the crowds
3%
expected price decrease
High Season:
August
Most popular time to fly
19%
expected price increase
Average Price:
$334
(avg. price over the last 2 weeks)
Good Deal:
$265
or less (round trip)

When to Book Flights from Lambert-St Louis to Phoenix Sky Harbor Intl

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 $265 or less.
The cheapest flight from Lambert-St Louis to Phoenix Sky Harbor Intl was found 25 days 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 July, August and September. The cheapest month to fly is January.
Morning departure is around 6% 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 Phoenix Sky Harbor Intl Flights

How long does a flight from Lambert-St Louis to Phoenix Sky Harbor Intl take?
An average nonstop flight takes 3h 25m, covering a distance of 1259 miles.
How many flights are there between Lambert-St Louis and Phoenix Sky Harbor Intl?
There are 83 (nonstop) flights between Lambert-St Louis and Phoenix Sky Harbor Intl per week, averaging 12 per day.
Which airlines provide the cheapest flights from Lambert-St Louis to Phoenix Sky Harbor Intl?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($154) and American Airlines ($291)
Do I need a passport to fly between Lambert-St Louis and Phoenix Sky Harbor Intl?
No.
Which airlines fly most frequently between Lambert-St Louis and Phoenix Sky Harbor Intl?
Southwest (6 times daily), American Airlines (5 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Lambert-St Louis to Phoenix Sky Harbor Intl?
For Lambert-St Louis to Phoenix Sky Harbor Intl, Wednesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Phoenix Sky Harbor Intl back to Lambert-St Louis, the best deals are generally found on Wednesday, with Thursday being the most expensive.

Book cheap flights from Lambert-St Louis to Phoenix Sky Harbor Intl (round-trip)

Airports
Origin
St. Louis
$154
only
$154
Destination
Phoenix
$154
only
$154
Wed, Jan 24
STL
PHX
16h 12m
Mon, Jan 29
PHX
STL
13h 20m
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

STL
PHX
Excellent 8.0

Good flight

Seats not reclining

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

Tue, Jan 2
STL
PHX
3h 31m
Sat, Jan 6
PHX
STL
2h 48m
Trip: 5 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 9 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
STL
PHX
Good 6.0

Crew was fine even when we had to sit on the ground for 1 1/2 hours for a repair.

American Airlines didn't honor my choice of seats.

STL
PHX
Good 7.3

You provide me with the best ticket prices and to me that was the the most important part of of the trip thx

The airlines charging for your luggage

MIA
JFK
Mediocre 2.0

Nothing !

Service was horrible. No leg room. Flight attendants were gossiping loudly behind me. Flight was late to leave and we were stuck at the gate once we landed.

EWR
PHX
Okay 5.6

Got me to where I'm going safely. Crew was nice.

Flying is painful

STL
PHX
Excellent 8.0

One I love free sodies and two I love free sodies with a smile. I definitely got both with this flight crew.

Not enough sodies and I couldn't smell my own farts.

Tue, Feb 27
STL
PHX
6h 30m
Wed, Mar 7
PHX
STL
8h 10m
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

MSY
DEN
Excellent 8.0

Flight was delayed

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

STL
PHX
Mediocre 3.6

I cannot be that mad because the plane got us there in one piece.

Don't be fooled by the sticker price...Frontier was once a great airline but now they nickel and dime you for everything. The only way I will take Frontier again is if I am traveling with only a backpack and have no desire to eat or drink anything on the plane. I ended up paying over $100 on the day of because of bags and seat choices.

STL
PHX
Excellent 8.0

Good flight

Seats not reclining

Tue, Dec 12
STL
PHX
6h 09m
Fri, Dec 15
PHX
STL
24h 12m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

Mon, Dec 11
STL
PHX
14h 59m
Mon, Dec 18
PHX
STL
12h 52m
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

Sun, Jan 7
STL
PHX
6h 30m
Sat, Jan 13
PHX
STL
7h 33m
Trip: 7 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

Thu, Mar 1
STL
PHX
3h 30m
Mon, Mar 5
PHX
STL
2h 57m
Trip: 5 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 9 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
CLT
BWI
Good 7.3

Crew was outstanding

Hurried beverage service since arriving early. R

STL
PHX
Good 6.0

Crew was fine even when we had to sit on the ground for 1 1/2 hours for a repair.

American Airlines didn't honor my choice of seats.

MIA
JFK
Mediocre 2.0

Nothing !

Service was horrible. No leg room. Flight attendants were gossiping loudly behind me. Flight was late to leave and we were stuck at the gate once we landed.

STL
PHX
Good 7.3

You provide me with the best ticket prices and to me that was the the most important part of of the trip thx

The airlines charging for your luggage

LAX
DEN
Mediocre 2.0

Everything. Had to sleep overnight in airport and was late coming home.

Tue, Feb 20
STL
PHX
6h 30m
Fri, Feb 23
PHX
STL
8h 04m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
DEN
Excellent 8.0

Flight was delayed

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

Sun, Mar 4
STL
PHX
6h 24m
Wed, Mar 7
PHX
STL
8h 10m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
DEN
Excellent 8.0

Flight was delayed

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

STL
PHX
Excellent 8.0

The flight was on time. The crew was friendly. They kept you informed throughout the whole flight.

The fact that the carry on item cost me $35. There was no entertainment provided. No complimentary food or drink.

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

STL
PHX
Excellent 8.0

Good flight

Seats not reclining

Sat, Mar 24
STL
PHX
3h 25m
Sat, Mar 31
PHX
STL
2h 57m
Trip: 8 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 9 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
STL
PHX
Excellent 8.0

One I love free sodies and two I love free sodies with a smile. I definitely got both with this flight crew.

Not enough sodies and I couldn't smell my own farts.

LAX
KOA
Okay 4.0

The fact that my original seats were not given. The other issue was that Alaska wasn’t my airline but American was. They didn’t even tell me until I got to the gate, moved over to another and then got transferred over to my gate.

STL
PHX
Good 7.3

You provide me with the best ticket prices and to me that was the the most important part of of the trip thx

The airlines charging for your luggage

MEM
DFW
Mediocre 2.0

Absolutely nothing

Everything about the flight was awful. Food pathetic, my monitor didn’t work, smooshed between 2 overweight passengers. Flight crew lacked simple etiquette.

LGA
CLT
Excellent 10.0

No complaints!

Thu, Nov 30
STL
PHX
16h 06m
Mon, Dec 4
PHX
STL
12h 59m
Trip: 5 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

STL
PHX
Mediocre 3.6

I cannot be that mad because the plane got us there in one piece.

Don't be fooled by the sticker price...Frontier was once a great airline but now they nickel and dime you for everything. The only way I will take Frontier again is if I am traveling with only a backpack and have no desire to eat or drink anything on the plane. I ended up paying over $100 on the day of because of bags and seat choices.

STL
PHX
Excellent 8.0

The flight was on time. The crew was friendly. They kept you informed throughout the whole flight.

The fact that the carry on item cost me $35. There was no entertainment provided. No complimentary food or drink.

Tue, Apr 3
STL
PHX
6h 24m
Thu, May 3
PHX
STL
20h 30m
Trip: 31 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
STL
PHX
Excellent 8.0

The flight was on time. The crew was friendly. They kept you informed throughout the whole flight.

The fact that the carry on item cost me $35. There was no entertainment provided. No complimentary food or drink.

MSP
DEN
Mediocre 2.0

We didn't make it to Vegas and they barely compensated us.

AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

MKE
LAS
Okay 5.6

The crew was most friendly and accommodating. Pilots very informative made a could be turbulent flight very smooth.

Seats are very uncomfortable had a bar straight across bottom of my back. Lack of food and beverages. The plane should always be stocked.

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

Fri, Jan 12
STL
PHX
16h 12m
Mon, Jan 15
PHX
STL
13h 20m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
STL
PHX
Excellent 8.0

Good flight

Seats not reclining

PHX
CVG
Good 7.0

I liked that the staff was friendly and the tickets were affordable

I didn’t like that there was no complimentary food or beverage options.

MCO
ATL
Okay 5.3

The poor way they handle things when the system goes down

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

Thu, Nov 23
STL
PHX
16h 06m
Sun, Nov 26
PHX
STL
19h 05m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
IAD
Mediocre 2.0

2.5 hours delay is what I didn’t like

DEN
ATL
Mediocre 2.0

I did not make the flight due to unclear announcements.

PSP
DEN
Mediocre 3.3

My flight crew. Received call concerning my bag in Atlanta, although I was still in Denver.

Long line to check in, anxiety about missing flight Had to pay for my carry on Missed my connecting flight, announcements were not clear Was told I to pay a rebooking fee for a flight two days later Frontier does not offer stand by Spent $285 with another airline to get to Atlanta on time

PHL
PBI
Good 6.3

The plane was clean and we left on time with no delays or issues. The flight crew were very nice and there was also enough overhead space for everyone’s bags.

The lines are excessively long to check a bag, there was only 1 of 4 check in kiosks working, which created it’s own line. Also the carry on bag fee at the airport was incredibly steep.

STL
PHX
Mediocre 3.6

I cannot be that mad because the plane got us there in one piece.

Don't be fooled by the sticker price...Frontier was once a great airline but now they nickel and dime you for everything. The only way I will take Frontier again is if I am traveling with only a backpack and have no desire to eat or drink anything on the plane. I ended up paying over $100 on the day of because of bags and seat choices.

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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.