Cheap Flights from San Diego to St. Louis
Browse current best options from San Diego. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
San Diego
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 San Diego to St. Louis
Explore current cheapest deals departing from San Diego to St. Louis
Round trip
Sort by: Cheapest
August 18 - August 24
SAN - St. Louis
$331
$166
Round trip
July 15 - July 20
SAN - St. Louis
$315
$170
Round trip
July 14 - July 27
SAN - St. Louis
$282
$170
Round trip
August 19 - August 24
SAN - St. Louis
$341
$170
Round trip
July 20 - July 27
SAN - St. Louis
$301
$170
Round trip
July 21 - July 27
SAN - St. Louis
$301
$170
Round trip
July 20 - August 16
SAN - St. Louis
$276
$170
Round trip
August 19 - August 23
SAN - St. Louis
$343
$170
Round trip
August 19 - August 31
SAN - St. Louis
$303
$171
Round trip
July 13 - July 19
SAN - St. Louis
$309
$175
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 San Diego to St. Louis
How much is a round trip from San Diego to St. Louis
Regular price: $275 - $410
Prices for flights from San Diego to St. Louis are currently below the regular range.
The regular price range for flights from San Diego to St. Louis is typically between $275 and $410. The current lowest deal is $166 with Frontier Airlines, for travel from Aug 18-Aug 24.
now $166
Low $275
High $410
The cheapest time to fly from San Diego to St. Louis
The cheapest month to fly from San Diego to St. Louis is April, with a median price of $160. The most expensive month is February, with a median price of $430. Prices are generally lower from January to December.
April
Flights from $160
February
Flights from $430
Direct flights from San Diego to St. Louis
Frontier Airlines
Deutsche Luft Hansa
Last-minute flights going from San Diego to St. Louis
Wed, Jun 17
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$378
$309
One-way
Wed, Jun 17
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$378
$309
One-way
Thu, Jun 18
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$376
$308
One-way
Thu, Jun 18
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$441
$309
One-way
Tue, Jun 23
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$339
$289
One-way
Thu, Jun 25
SAN - St. Louis
San Diego (SAN) - St. Louis (STL)
Frontier Airlines
$362
$284
One-way
Biggest price drops on these dates for flights from San Diego to St. Louis
Aug 19 - Aug 23
$343 → $170
50%
Aug 19 - Aug 24
$341 → $170
50%
Aug 18 - Aug 24
$331 → $166
50%
Aug 6 - Aug 10
$346 → $185
47%
Popular Airports to fly from San Diego to St. Louis
San Diego - St. Louis route insights
💸 Price insights
Recent fares are above the typical level
Recent fares for San Diego to St. Louis are above the typical level, with 25% good prices.
📅 Best time to fly
Fly in April for prices as low as $160
Historically, April is the cheapest month to fly from San Diego to St. Louis, at $160.
⏱️ Flight duration
The median flight time is 12h 57m
Flights from San Diego to St. Louis typically take 12h 57m, covering a distance of 2501 km.
✈️ Airlines & availability
Connecting flights are more common
About 60% of recent deals are for connecting flights, with a median of 2 stopovers.
🏆 Airline highlight
Frontier Airlines offers direct flights
Frontier Airlines has offered 87 direct deals from San Diego to St. Louis recently.
🎯 Booking tip
Deals appear frequently
Deals for flights from San Diego to St. Louis appear frequently, about 1 per day.
San Diego main airports to depart from
San Diego International (SAN)
San Diego International is often the cheapest option for flights from San Diego to St. Louis.
📍 ~5 km from San Diego city center (reachable by car)
💸 Flights from ~$166
McClellan–Palomar (CLD)
Consider McClellan–Palomar for an alternative departure airport from the San Diego area to St. Louis.
📍 ~40 km from San Diego city center (reachable by car)
💸 Flights from ~$348
St. Louis main airports to arrive at
St. Louis Lambert International (STL)
St. Louis Lambert International Airport is a convenient arrival airport for your trip to St. Louis.
📍 ~20 km from St. Louis (reachable by car)
💸 Flights from ~$166
Airports nearby St. Louis used as alternative
MidAmerica St. Louis (BLV)
MidAmerica St. Louis (BLV) is a useful alternative, especially for budget routes and travelers on the Illinois side.
📍 ~55 km from St. Louis (reachable by car)
💸 Flights from ~$209
Columbia Regional (COU)
Columbia Regional (COU) offers a full range of cabin classes and serves as a reliable regional hub.
📍 ~180 km from St. Louis (reachable by car)
💸 Flights from ~$318
Abraham Lincoln Capital (SPI)
Abraham Lincoln Capital (SPI) provides consistent regional service and includes Business class availability.
📍 ~150 km from St. Louis (reachable by car)
💸 Flights from ~$438
General Wayne A. Downing Peoria International (PIA)
General Wayne A. Downing Peoria International (PIA) is a larger regional airport with multiple cabin classes.
📍 ~235 km from St. Louis (reachable by car)
💸 Flights from ~$255
Central Illinois Regional (BMI)
Central Illinois Regional (BMI) is an option for travelers willing to drive into Central Illinois.
📍 ~230 km from St. Louis (reachable by car)
💸 Flights from ~$348
Business & First Class Flight Deals to St. Louis
Discover luxury on the budget with premium cabin class on flights from San Diego 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 CLD
Elite
Aug 14
St. Louis, United States
89% AI deal score
$1,911
$869
Save $1,042
From SAN
Elite
Jul 28
St. Louis, United States
86% AI deal score
$1,686
$957
Save $729
From CLD
Elite
Jul 01
St. Louis, United States
86% AI deal score
$1,770
$939
Save $831
From SAN
Elite
Aug 24
St. Louis, United States
85% AI deal score
$1,489
$957
Save $532
From SAN
Elite
Dec 05
St. Louis, United States
85% AI deal score
$1,505
$957
Save $548
From SAN
Elite
Nov 18
St. Louis, United States
85% AI deal score
$1,487
$957
Save $530
From SAN
Elite
Nov 10
St. Louis, United States
85% AI deal score
$1,487
$957
Save $530
From SAN
Elite
Aug 21
St. Louis, United States
85% AI deal score
$1,487
$957
Save $530
From SAN
Elite
Nov 07
St. Louis, United States
85% AI deal score
$1,488
$957
Save $531
From SAN
Elite
Aug 23
St. Louis, United States
85% AI deal score
$1,488
$957
Save $531
From SAN
Elite
Nov 14
St. Louis, United States
85% AI deal score
$1,487
$957
Save $530
From SAN
Elite
Oct 24
St. Louis, United States
85% AI deal score
$1,460
$957
Save $503
From SAN
Elite
Aug 04
St. Louis, United States
85% AI deal score
$1,831
$1,039
Save $792
From SAN
Elite
Sep 26
St. Louis, United States
84% AI deal score
$1,388
$957
Save $431
From SAN
Elite
Sep 30
St. Louis, United States
84% AI deal score
$1,391
$957
Save $434
From SAN
Elite
Sep 29
St. Louis, United States
84% AI deal score
$1,391
$957
Save $434
From SAN
Elite
Jul 08
St. Louis, United States
84% AI deal score
$1,398
$957
Save $441
From SAN
Elite
Aug 04
St. Louis, United States
84% AI deal score
$2,140
$957
Save $1,183
From SAN
Elite
Sep 19
St. Louis, United States
84% AI deal score
$1,379
$957
Save $422
From SAN
Elite
Sep 02
St. Louis, United States
84% AI deal score
$1,377
$957
Save $420
From SAN
Elite
Oct 26
St. Louis, United States
84% AI deal score
$1,460
$997
Save $463
From CLD
Elite
Oct 08
St. Louis, United States
84% AI deal score
$2,237
$949
Save $1,288
From SAN
Elite
Jul 14
St. Louis, United States
83% AI deal score
$1,348
$957
Save $391
From SAN
Elite
Jul 15
St. Louis, United States
83% AI deal score
$1,345
$957
Save $388
From SAN
Elite
Jul 31
St. Louis, United States
83% AI deal score
$1,302
$957
Save $345
From SAN
Elite
Jul 31
St. Louis, United States
83% AI deal score
$1,779
$963
Save $816
From SAN
Elite
Jul 01
St. Louis, United States
83% AI deal score
$1,629
$1,039
Save $590
From SAN
Elite
Jul 30
St. Louis, United States
83% AI deal score
$1,667
$1,043
Save $624
From CLD
Elite
Jul 30
St. Louis, United States
83% AI deal score
$1,816
$1,084
Save $732
From SAN
Elite
Jul 13
St. Louis, United States
82% AI deal score
$1,348
$998
Save $350
From SAN
Elite
Jul 15
St. Louis, United States
82% AI deal score
$1,640
$1,039
Save $601
From CLD
Elite
Jul 28
St. Louis, United States
82% AI deal score
$1,768
$1,080
Save $688
From SAN
Elite
Aug 14
St. Louis, United States
81% AI deal score
$1,814
$1,180
Save $634
From SAN
Elite
Jul 30
St. Louis, United States
80% AI deal score
$1,667
$1,159
Save $508
From SAN
Elite
Jul 03
St. Louis, United States
80% AI deal score
$1,629
$1,161
Save $468
From SAN
Elite
Jun 20
St. Louis, United States
76% AI deal score
$2,004
$1,478
Save $526
From SAN
Elite
Sep 10
St. Louis, United States
75% AI deal score
$2,074
$1,381
Save $693
From SAN
Elite
Aug 30
St. Louis, United States
75% AI deal score
$1,973
$1,409
Save $564
From SAN
Elite
Jul 12
St. Louis, United States
75% AI deal score
$1,638
$1,200
Save $438
From SAN
Elite
Aug 12
St. Louis, United States
74% AI deal score
$1,856
$1,409
Save $447
From SAN
Elite
Jul 14
St. Louis, United States
74% AI deal score
$1,949
$1,473
Save $476
From SAN
Elite
Jul 07
St. Louis, United States
74% AI deal score
$1,919
$1,473
Save $446
From SAN
Elite
Jul 04
St. Louis, United States
74% AI deal score
$1,922
$1,475
Save $447
From SAN
Elite
Jun 28
St. Louis, United States
74% AI deal score
$1,635
$1,251
Save $384
From CLD
Elite
Jul 03
St. Louis, United States
74% AI deal score
$1,770
$1,363
Save $407
From SAN
Elite
Jul 07
St. Louis, United States
73% AI deal score
$1,938
$1,499
Save $439
From SAN
Elite
Jul 06
St. Louis, United States
73% AI deal score
$1,911
$1,553
Save $358
From SAN
Elite
Jul 03
St. Louis, United States
73% AI deal score
$1,921
$1,553
Save $368
From SAN
Elite
Jul 14
St. Louis, United States
73% AI deal score
$1,930
$1,553
Save $377
From SAN
Elite
Jul 07
St. Louis, United States
73% AI deal score
$1,901
$1,553
Save $348
From SAN
Elite
Jul 04
St. Louis, United States
73% AI deal score
$1,909
$1,555
Save $354
From SAN
Elite
Jul 13
St. Louis, United States
73% AI deal score
$1,638
$1,340
Save $298
From CLD
Elite
Jul 13
St. Louis, United States
73% AI deal score
$1,779
$1,376
Save $403
From SAN
Elite
Jun 18
St. Louis, United States
73% AI deal score
$1,744
$1,415
Save $329
From SAN
Elite
Jun 21
St. Louis, United States
73% AI deal score
$1,769
$1,446
Save $323
From SAN
Elite
Jun 16
St. Louis, United States
72% AI deal score
$2,255
$1,926
Save $329
From SAN
Elite
Aug 13
St. Louis, United States
72% AI deal score
$1,793
$1,259
Save $534
From SAN
Elite
Jul 04
St. Louis, United States
71% AI deal score
$1,416
$1,189
Save $227
From SAN
Elite
Oct 21
St. Louis, United States
70% AI deal score
$1,486
$1,284
Save $202
From SAN
Elite
Jun 18
St. Louis, United States
70% AI deal score
$2,209
$1,779
Save $430
From SAN
Elite
Aug 13
St. Louis, United States
69% AI deal score
$1,814
$1,488
Save $326
From SAN
Elite
Sep 04
St. Louis, United States
66% AI deal score
$1,778
$1,699
Save $79
From SAN
Elite
Jul 16
St. Louis, United States
66% AI deal score
$1,807
$1,725
Save $82
From SAN
Elite
Aug 10
St. Louis, United States
66% AI deal score
$2,765
From SAN
Elite
Jul 20
St. Louis, United States
66% AI deal score
$2,846
From SAN
Elite
Aug 10
St. Louis, United States
66% AI deal score
$2,848
From SAN
Elite
Jul 09
St. Louis, United States
66% AI deal score
$2,856
From SAN
Elite
Aug 25
St. Louis, United States
66% AI deal score
$2,867
From SAN
Elite
Aug 10
St. Louis, United States
66% AI deal score
$2,911
From SAN
Elite
Jun 19
St. Louis, United States
65% AI deal score
$1,771
From SAN
Elite
Aug 10
St. Louis, United States
65% AI deal score
$3,080
From SAN
Elite
Jul 20
St. Louis, United States
65% AI deal score
$3,085
From SAN
Elite
Jun 21
St. Louis, United States
48% AI deal score
$2,382
From SAN
Elite
Jul 10
St. Louis, United States
45% AI deal score
$1,784
From SAN
Elite
Oct 08
St. Louis, United States
45% AI deal score
$2,535
From SAN
Elite
Jul 18
St. Louis, United States
44% AI deal score
$3,026
From SAN
Elite
Sep 17
St. Louis, United States
44% AI deal score
$2,530
From SAN
Elite
Jun 23
St. Louis, United States
44% AI deal score
$3,026
From SAN
Elite
Jun 28
St. Louis, United States
43% AI deal score
$1,967
From SAN
Elite
Jul 09
St. Louis, United States
42% AI deal score
$1,710
From SAN
Elite
Jul 24
St. Louis, United States
42% AI deal score
$1,951
From SAN
Elite
Oct 09
St. Louis, United States
42% AI deal score
$2,274
From SAN
Elite
Jun 26
St. Louis, United States
41% AI deal score
$2,534
From SAN
Elite
Jul 17
St. Louis, United States
39% AI deal score
$2,145
From SAN
Elite
Jul 30
St. Louis, United States
39% AI deal score
$2,150
From SAN
Elite
Jul 23
St. Louis, United States
39% AI deal score
$2,290
From SAN
Elite
Jun 28
St. Louis, United States
39% AI deal score
$2,386
From SAN
Elite
Jun 30
St. Louis, United States
39% AI deal score
$2,422
From SAN
Elite
Jun 19
St. Louis, United States
39% AI deal score
$2,562
From SAN
Elite
Jun 26
St. Louis, United States
39% AI deal score
$3,330