Cheap Flights from Phoenix to St. Louis
Browse current best options from Phoenix. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Phoenix
RatePunk searches hundreds of travel sites at once for deals on flights to St. Louis
Prices updated 24 days ago
486,190 searches this week
171 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)
Today’s best flight deals from Phoenix to St. Louis
Explore current cheapest deals departing from Phoenix to St. Louis
Round trip
Sort by: Cheapest
August 19 - August 31
PHX - St. Louis
$263
$159
Round trip
August 19 - August 24
PHX - St. Louis
$297
$159
Round trip
August 26 - August 31
PHX - St. Louis
$297
$159
Round trip
August 11 - August 17
PHX - St. Louis
$286
$159
Round trip
July 21 - July 27
PHX - St. Louis
$292
$159
Round trip
July 14 - July 27
PHX - St. Louis
$273
$159
Round trip
July 14 - July 21
PHX - St. Louis
$300
$159
Round trip
August 12 - August 17
PHX - St. Louis
$292
$159
Round trip
July 21 - August 17
PHX - St. Louis
$267
$160
Round trip
August 23 - September 8
PHX - St. Louis
$258
$233
Round trip
Unlock all 500+ flight deals to St. Louis and get alerts when great deals appear
Route Intelligence — 486,190 Searches this Week
Insights for flights from Phoenix to St. Louis
How much is a round trip from Phoenix to St. Louis
Regular price: $241 - $394
Prices for flights from Phoenix to St. Louis are currently below the regular range.
The regular price range for flights from Phoenix to St. Louis is typically between $241 and $394. The current lowest deal is $159 with Frontier Airlines for travel from Aug 19 to Aug 24.
now $159
Low $241
High $394
The cheapest time to fly from Phoenix to St. Louis
The cheapest month to fly from Phoenix to St. Louis is August, with a median price of $185. The most expensive month is December, with a median price of $689. Prices are generally lower from March to October.
August
Flights from $185
December
Flights from $689
Direct flights from Phoenix to St. Louis
American Airlines
Last-minute flights going from Phoenix to St. Louis
Tue, Jun 23
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$266
$435
One-way
Tue, Jun 23
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$257
$435
One-way
Wed, Jun 24
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$338
$430
One-way
Wed, Jun 24
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$253
$435
One-way
Tue, Jun 30
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$318
$394
One-way
Tue, Jun 30
PHX - St. Louis
Phoenix (PHX) - St. Louis (STL)
$380
$405
One-way
Biggest price drops on these dates for flights from Phoenix to St. Louis
Nov 5 - Nov 7
$575 → $289
50%
Nov 3 - Nov 10
$552 → $289
48%
Nov 5 - Nov 10
$568 → $384
32%
Nov 5 - Nov 12
$557 → $379
32%
Popular Airports to fly from Phoenix to St. Louis
Phoenix - St. Louis route insights
💸 Price insights
Recent fares are below the typical level
Recent roundtrip fares from Phoenix to St. Louis have been below the typical level.
📅 Best time to fly
August is historically cheapest at $185
Historically, August is the cheapest month to fly from Phoenix to St. Louis, with a median price of $185.
⏱️ Flight duration
Median flight time is 13h 5m
The median flight time from Phoenix to St. Louis is 13 hours 5 minutes.
✈️ Airlines & availability
Connecting flights are dominant
Connecting flights are dominant, with a median of 2 stopovers when connecting.
🏆 Airline highlight
American Airlines offers direct flights
American Airlines provides direct flight options for the Phoenix to St. Louis route.
🎯 Booking tip
Deals are frequent for this route
Deals for flights from Phoenix to St. Louis are frequent, with over 1 deal per day.
Phoenix main airports to depart from
Phoenix Sky Harbor International (PHX)
Phoenix Sky Harbor International Airport is a primary option for flights from Phoenix to St. Louis.
📍 ~6 km from Phoenix city center (reachable by car or bus)
💸 Flights from ~$159
Phoenix–Mesa Gateway (AZA)
Phoenix–Mesa Gateway Airport offers an alternative for flights from Phoenix to St. Louis.
📍 ~40 km from Phoenix city center (reachable by car)
💸 Flights from ~$289
St. Louis main airports to arrive at
St. Louis Lambert International (STL)
St. Louis Lambert International Airport is a convenient arrival point for flights from Phoenix to St. Louis.
📍 ~20 km from St. Louis (reachable by car)
💸 Flights from ~$159
Airports nearby St. Louis used as alternative
MidAmerica St. Louis (BLV)
MidAmerica St. Louis (BLV) can be a useful alternative, especially for budget routes on the Illinois side.
📍 ~55 km from St. Louis (reachable by car)
💸 Flights from ~$239
Columbia Regional (COU)
Columbia Regional (COU) offers a full range of cabin classes and serves the University of Missouri area.
📍 ~175 km from St. Louis (reachable by car)
💸 Flights from ~$308
Abraham Lincoln Capital (SPI)
Abraham Lincoln Capital (SPI) provides consistent regional service from the state capital.
📍 ~150 km from St. Louis (reachable by car)
💸 Flights from ~$426
General Wayne A. Downing Peoria International (PIA)
General Wayne A. Downing Peoria International (PIA) is a larger regional airport offering multiple cabin classes.
📍 ~235 km from St. Louis (reachable by car)
💸 Flights from ~$156
Central Illinois Regional (BMI)
Central Illinois Regional (BMI) is an alternative for travelers willing to drive into Central Illinois.
📍 ~230 km from St. Louis (reachable by car)
💸 Flights from ~$145
Business & First Class Flight Deals to St. Louis
Discover luxury on the budget with premium cabin class on flights from Phoenix to St. Louis.
Elite
Best Elite deals to St. Louis
Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.
From PHX
Elite
Oct 13
St. Louis, United States
85% AI deal score
$1,933
$965
Save $968
From PHX
Elite
Oct 16
St. Louis, United States
84% AI deal score
$1,989
$1,044
Save $945
From PHX
Elite
Oct 16
St. Louis, United States
83% AI deal score
$1,893
$1,052
Save $841
From PHX
Elite
Sep 11
St. Louis, United States
83% AI deal score
$1,864
$1,044
Save $820
From PHX
Elite
Jun 30
St. Louis, United States
82% AI deal score
$1,815
$1,085
Save $730
From PHX
Elite
Jun 20
St. Louis, United States
82% AI deal score
$2,276
$1,102
Save $1,174
From PHX
Elite
Jul 15
St. Louis, United States
82% AI deal score
$1,645
$953
Save $692
From PHX
Elite
Aug 29
St. Louis, United States
81% AI deal score
$1,414
$959
Save $455
From PHX
Elite
Aug 04
St. Louis, United States
81% AI deal score
$1,555
$1,011
Save $544
From PHX
Elite
Sep 05
St. Louis, United States
80% AI deal score
$1,340
$959
Save $381
From PHX
Elite
Sep 29
St. Louis, United States
80% AI deal score
$1,351
$959
Save $392
From PHX
Elite
Oct 14
St. Louis, United States
80% AI deal score
$1,430
$1,022
Save $408
From PHX
Elite
Aug 03
St. Louis, United States
80% AI deal score
$1,569
$1,052
Save $517
From PHX
Elite
Jul 21
St. Louis, United States
80% AI deal score
$1,529
$953
Save $576
From PHX
Elite
Jul 29
St. Louis, United States
79% AI deal score
$1,318
$1,011
Save $307
From PHX
Elite
Sep 08
St. Louis, United States
79% AI deal score
$1,334
$1,011
Save $323
From PHX
Elite
Sep 15
St. Louis, United States
79% AI deal score
$1,343
$1,011
Save $332
From PHX
Elite
Aug 24
St. Louis, United States
79% AI deal score
$1,402
$1,036
Save $366
From PHX
Elite
Jul 15
St. Louis, United States
79% AI deal score
$1,529
$989
Save $540
From PHX
Elite
Jul 13
St. Louis, United States
79% AI deal score
$1,654
$1,092
Save $562
From PHX
Elite
Aug 19
St. Louis, United States
78% AI deal score
$1,402
$1,056
Save $346
From PHX
Elite
Jul 07
St. Louis, United States
78% AI deal score
$1,393
$1,063
Save $330
From PHX
Elite
Jul 15
St. Louis, United States
78% AI deal score
$1,343
$1,063
Save $280
From PHX
Elite
Jun 29
St. Louis, United States
76% AI deal score
$1,872
$1,246
Save $626
From PHX
Elite
Aug 11
St. Louis, United States
73% AI deal score
$1,956
$1,400
Save $556
From PHX
Elite
Aug 07
St. Louis, United States
73% AI deal score
$2,073
$1,429
Save $644
From PHX
Elite
Aug 11
St. Louis, United States
73% AI deal score
$2,137
$1,516
Save $621
From PHX
Elite
Aug 07
St. Louis, United States
73% AI deal score
$2,125
$1,517
Save $608
From PHX
Elite
Jul 11
St. Louis, United States
73% AI deal score
$1,343
$1,085
Save $258
From PHX
Elite
Jul 25
St. Louis, United States
73% AI deal score
$1,318
$1,085
Save $233
From PHX
Elite
Jul 22
St. Louis, United States
73% AI deal score
$1,508
$1,060
Save $448
From PHX
Elite
Jul 02
St. Louis, United States
73% AI deal score
$1,602
$1,171
Save $431
From PHX
Elite
Jun 20
St. Louis, United States
73% AI deal score
$1,636
$1,220
Save $416
From PHX
Elite
Aug 07
St. Louis, United States
72% AI deal score
$1,946
$1,434
Save $512
From PHX
Elite
Jul 28
St. Louis, United States
72% AI deal score
$1,928
$1,435
Save $493
From PHX
Elite
Jul 28
St. Louis, United States
72% AI deal score
$1,943
$1,435
Save $508
From PHX
Elite
Jul 28
St. Louis, United States
72% AI deal score
$1,868
$1,440
Save $428
From PHX
Elite
Aug 07
St. Louis, United States
72% AI deal score
$1,973
$1,478
Save $495
From PHX
Elite
Aug 14
St. Louis, United States
72% AI deal score
$2,002
$1,479
Save $523
From PHX
Elite
Jul 24
St. Louis, United States
72% AI deal score
$2,013
$1,514
Save $499
From PHX
Elite
Jul 24
St. Louis, United States
72% AI deal score
$2,061
$1,554
Save $507
From PHX
Elite
Aug 03
St. Louis, United States
72% AI deal score
$2,133
$1,579
Save $554
From PHX
Elite
Jul 16
St. Louis, United States
72% AI deal score
$2,110
$1,580
Save $530
From PHX
Elite
Jul 04
St. Louis, United States
72% AI deal score
$1,359
$1,115
Save $244
From PHX
Elite
Jul 31
St. Louis, United States
72% AI deal score
$1,541
$1,165
Save $376
From PHX
Elite
Jul 19
St. Louis, United States
72% AI deal score
$1,529
$1,165
Save $364
From PHX
Elite
Jul 01
St. Louis, United States
72% AI deal score
$1,544
$1,167
Save $377
From PHX
Elite
Jul 28
St. Louis, United States
71% AI deal score
$1,872
$1,484
Save $388
From PHX
Elite
Jul 24
St. Louis, United States
71% AI deal score
$1,869
$1,514
Save $355
From PHX
Elite
Jul 05
St. Louis, United States
71% AI deal score
$1,895
$1,514
Save $381
From PHX
Elite
Jul 24
St. Louis, United States
71% AI deal score
$1,932
$1,514
Save $418
From PHX
Elite
Jul 24
St. Louis, United States
71% AI deal score
$1,868
$1,519
Save $349
From PHX
Elite
Jul 16
St. Louis, United States
71% AI deal score
$1,868
$1,540
Save $328
From PHX
Elite
Jul 16
St. Louis, United States
71% AI deal score
$1,868
$1,540
Save $328
From PHX
Elite
Jul 19
St. Louis, United States
71% AI deal score
$1,868
$1,544
Save $324
From PHX
Elite
Jul 19
St. Louis, United States
71% AI deal score
$1,942
$1,544
Save $398
From PHX
Elite
Jul 05
St. Louis, United States
71% AI deal score
$1,951
$1,554
Save $397
From PHX
Elite
Jul 05
St. Louis, United States
71% AI deal score
$1,895
$1,554
Save $341
From PHX
Elite
Jul 28
St. Louis, United States
71% AI deal score
$1,932
$1,554
Save $378
From PHX
Elite
Jul 05
St. Louis, United States
71% AI deal score
$1,965
$1,559
Save $406
From PHX
Elite
Jul 28
St. Louis, United States
71% AI deal score
$1,960
$1,560
Save $400
From PHX
Elite
Aug 03
St. Louis, United States
71% AI deal score
$1,969
$1,579
Save $390
From PHX
Elite
Jul 19
St. Louis, United States
71% AI deal score
$1,943
$1,584
Save $359
From PHX
Elite
Aug 03
St. Louis, United States
71% AI deal score
$1,924
$1,584
Save $340
From PHX
Elite
Jul 05
St. Louis, United States
71% AI deal score
$2,045
$1,633
Save $412
From PHX
Elite
Jul 13
St. Louis, United States
71% AI deal score
$1,532
$1,197
Save $335
From PHX
Elite
Jul 19
St. Louis, United States
70% AI deal score
$1,869
$1,544
Save $325
From PHX
Elite
Jul 19
St. Louis, United States
70% AI deal score
$1,868
$1,549
Save $319
From PHX
Elite
Jul 24
St. Louis, United States
70% AI deal score
$1,854
$1,563
Save $291
From PHX
Elite
Jul 12
St. Louis, United States
70% AI deal score
$1,881
$1,579
Save $302
From PHX
Elite
Jul 12
St. Louis, United States
70% AI deal score
$1,882
$1,579
Save $303
From PHX
Elite
Jul 12
St. Louis, United States
70% AI deal score
$1,881
$1,579
Save $302
From PHX
Elite
Jul 24
St. Louis, United States
70% AI deal score
$1,868
$1,633
Save $235
From PHX
Elite
Jun 26
St. Louis, United States
70% AI deal score
$2,098
$1,772
Save $326
From PHX
Elite
Jun 19
St. Louis, United States
70% AI deal score
$2,373
$1,959
Save $414
From PHX
Elite
Jul 19
St. Louis, United States
69% AI deal score
$1,868
$1,665
Save $203
From PHX
Elite
Aug 05
St. Louis, United States
67% AI deal score
$1,999
$1,622
Save $377
From PHX
Elite
Jul 15
St. Louis, United States
50% AI deal score
$1,710
$1,588
Save $122
From PHX
Elite
Aug 11
St. Louis, United States
46% AI deal score
$2,089
From PHX
Elite
Oct 01
St. Louis, United States
45% AI deal score
$2,051
From PHX
Elite
Aug 15
St. Louis, United States
43% AI deal score
$2,619
From PHX
Elite
Jul 08
St. Louis, United States
42% AI deal score
$2,532
From PHX
Elite
Sep 28
St. Louis, United States
41% AI deal score
$2,492
From PHX
Elite
Jul 09
St. Louis, United States
40% AI deal score
$2,184
From PHX
Elite
Jun 30
St. Louis, United States
40% AI deal score
$2,192
From PHX
Elite
Jun 24
St. Louis, United States
40% AI deal score
$3,190
From PHX
Elite
Jun 30
St. Louis, United States
37% AI deal score
$2,155
From PHX
Elite
Jul 22
St. Louis, United States
37% AI deal score
$2,334
From PHX
Elite
Jul 19
St. Louis, United States
36% AI deal score
$2,769
From PHX
Elite
Oct 08
St. Louis, United States
36% AI deal score
$14,249