Cheap flights from Arizona to St. Louis from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Arizona to St. Louis departing on 2/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Arizona to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:00 am - 12:12 pm
LAS
-
STL
3h 12mnonstop
Frontier Logo
10:09 pm - 11:57 pm
STL
-
LAS
3h 48mnonstop
$79Frontier
Fri, Jan 9 - Sun, Jan 18
Frontier Logo
3:32 pm - 8:48 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
9:45 pm - 11:44 pm
STL
-
LAS
3h 59mnonstop
$80Frontier
Fri, Jan 23 - Mon, Jan 26
Frontier Logo
3:32 pm - 8:48 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
9:45 pm - 11:44 pm
STL
-
LAS
3h 59mnonstop
$125Frontier
Fri, Jan 23 - Mon, Jan 26
Frontier Logo
3:32 pm - 8:48 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
1:40 pm - 5:35 pm
STL
-
LAS
5h 55m1 stop
$131Frontier
Fri, Jan 23 - Mon, Jan 26
Multiple Airlines Logo
11:51 am - 6:51 am
LAS
-
STL
17h 00m2 stops
Multiple Airlines Logo
9:45 pm - 11:44 pm
STL
-
LAS
3h 59mnonstop
$148Multiple Airlines
Fri, Feb 6 - Mon, Feb 9
Multiple Airlines Logo
7:25 am - 12:40 pm
LAS
-
STL
3h 15mnonstop
Multiple Airlines Logo
7:39 pm - 5:18 pm
STL
-
LAS
23h 39m2 stops
$158Multiple Airlines
Fri, Jan 16 - Fri, Jan 23
American Airlines Logo
5:56 pm - 11:50 pm
TUS
-
STL
4h 54m1 stop
American Airlines Logo
11:46 am - 6:40 pm
STL
-
TUS
7h 54m1 stop
$243American Airlines
Sat, Feb 14 - Wed, Feb 18
American Airlines Logo
2:46 pm - 11:18 pm
TUS
-
STL
7h 32m2 stops
American Airlines Logo
5:55 pm - 11:04 pm
STL
-
TUS
6h 09m1 stop
$282American Airlines
Sat, Feb 14 - Wed, Feb 18
Delta Logo
1:42 pm - 8:37 pm
TUS
-
STL
5h 55m1 stop
Delta Logo
2:38 pm - 10:37 pm
STL
-
TUS
8h 59m1 stop
$287Delta
Wed, Jan 28 - Wed, Feb 4
Southwest Logo
7:20 am - 4:35 pm
TUS
-
STL
8h 15m2 stops
Southwest Logo
6:10 am - 12:15 pm
STL
-
TUS
7h 05m1 stop
$310Southwest
Wed, Feb 18 - Sat, Feb 21

Frontier flights from Arizona to St. Louis

Our best Frontier deals on Arizona to St. Louis flight tickets
Frontier
Jan 9
LAS7:00 amLas Vegas Harry Reid Intl
3h 12m
STL12:12 pmLambert-St Louis
Jan 18
STL10:09 pmLambert-St Louis
3h 48m
LAS11:57 pmLas Vegas Harry Reid Intl
Frontier
Jan 23
LAS3:32 pmLas Vegas Harry Reid Intl
3h 16m
STL8:48 pmLambert-St Louis
Jan 26
STL9:45 pmLambert-St Louis
3h 59m
LAS11:44 pmLas Vegas Harry Reid Intl
Frontier
Jan 23
LAS3:32 pmLas Vegas Harry Reid Intl
3h 16m
STL8:48 pmLambert-St Louis
Jan 26
STL9:45 pmLambert-St Louis
3h 59m
LAS11:44 pmLas Vegas Harry Reid Intl

Delta flights from Arizona to St. Louis

Our best Delta deals on Arizona to St. Louis flight tickets
Delta
Mar 26
LAS12:50 amLas Vegas Harry Reid Intl
6h 11m
1 stop
STL9:01 amLambert-St Louis
Mar 29
STL6:12 pmLambert-St Louis
7h 32m
1 stop
LAS11:44 pmLas Vegas Harry Reid Intl
Delta
Feb 3
LAS11:00 amLas Vegas Harry Reid Intl
10h 25m
2 stops
STL11:25 pmLambert-St Louis
Feb 10
STL6:10 amLambert-St Louis
10h 50m
2 stops
LAS3:00 pmLas Vegas Harry Reid Intl
Delta
Mar 24
LAS11:00 amLas Vegas Harry Reid Intl
11h 21m
2 stops
STL12:21 amLambert-St Louis
Mar 30
STL6:12 pmLambert-St Louis
7h 32m
1 stop
LAS11:44 pmLas Vegas Harry Reid Intl

momondo Fare Finder

 
Customize your flight search to find flights from Arizona to St. Louis 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 21, 2025.
Use the filters below to find and compare flights from Arizona to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/9

7:00 am-12:12 pm

Nonstop3h 12m

Lambert-St Louis

Sun 1/18

10:09 pm-11:57 pm

Nonstop3h 48m

$79

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/23

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Mon 1/26

9:45 pm-11:44 pm

Nonstop3h 59m

$80

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/23

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Mon 1/26

9:45 pm-11:44 pm

Nonstop3h 59m

$125

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/23

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Mon 1/26

1:40 pm-5:35 pm

1 stop5h 55m

$131

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 2/6

11:51 am-6:51 am

2 stops17h 00m

Lambert-St Louis

Mon 2/9

9:45 pm-11:44 pm

Nonstop3h 59m

$148

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/16

7:25 am-12:40 pm

Nonstop3h 15m

Lambert-St Louis

Fri 1/23

7:39 pm-5:18 pm

2 stops23h 39m

$158

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 2/14

5:56 pm-11:50 pm

1 stop4h 54m

Lambert-St Louis

Wed 2/18

11:46 am-6:40 pm

1 stop7h 54m

$243

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 2/14

2:46 pm-11:18 pm

2 stops7h 32m

Lambert-St Louis

Wed 2/18

5:55 pm-11:04 pm

1 stop6h 09m

$282

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

1:42 pm-8:37 pm

1 stop5h 55m

Lambert-St Louis

Wed 2/4

2:38 pm-10:37 pm

1 stop8h 59m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/18

7:20 am-4:35 pm

2 stops8h 15m

Lambert-St Louis

Sat 2/21

6:10 am-12:15 pm

1 stop7h 05m

$310

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 St. Louis from

How to get the cheapest flight ticket from Arizona to St. Louis

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 month to fly to St. Louis?

In general, November is the cheapest month to fly from Arizona to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $337. The month of October is another great option to travel to St. Louis, with average flight prices from Arizona averaging around $338.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $369. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $455. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Arizona at noon is the least expensive time of day to depart. momondo users have found prices as low as $384 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $403 per ticket.

What is the cheapest Arizona to Lambert-St Louis flight route?

Fly from Phoenix Sky Harbor Intl to Lambert-St Louis for the best Arizona - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Arizona when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $376 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Arizona for as low as $316 on momondo.

What cabin class options are available on Arizona to Lambert-St Louis flights?

There are 3 cabin classes available to choose from on Arizona to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

No. A direct flight is the cheapest option for a flight between Arizona to St. Louis.

Cheap Arizona to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Arizona to St. Louis

Best Price Found

$115

Fastest flight time

2h 45m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Arizona in the past 72 hours is $115. The best round-trip flight deal from Arizona to St. Louis found on momondo in the last 72 hours is $283.
The fastest flight from Arizona to St. Louis takes 2h 45m
Direct flights go from Arizona to St. Louis every day.
There is 1 airport in St. Louis. From Arizona there are direct flights to Lambert-St Louis (STL).
  • When did momondo last update prices for flights from Arizona to Lambert-St Louis Airport?

    Prices for flights from Arizona to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Arizona to Lambert-St Louis Airport?

  • How old do you have to be to fly from Arizona to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Arizona to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Arizona to St. Louis?

Best airlines flying from Arizona to St. Louis

Compare and see reviews for airlines that fly from Arizona to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $120Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
DeltaPriceFrom $134Free CancellationRating
7.9
8,021 reviews
Search Delta flights
United AirlinesPriceFrom $198Free CancellationRating
7.4
9,099 reviews
Search United Airlines flights
American AirlinesPriceFrom $229Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
SouthwestPriceFrom $262Free CancellationRating
8.0
4,257 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
Fenton
St. Peters
Wentzville
Collinsville
Alton
Farmington
Clayton
Festus
Glencoe
Eureka
Edwardsville
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Arizona to St. Louis?

Finding the right flight to St. Louis from Arizona 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 St. Louis quick and easy, saving you time and money.

Can I find flights from Arizona to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Arizona which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Arizona to St. Louis?

Once you have performed a search for Arizona to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Arizona to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Arizona to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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1 adult
Tue 1/20
Tue 1/27

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