Flights Los Angeles → St Louis
As of November 2026, economy flights from Los Angeles to St Louis have a typical range USD 498–793, median USD 570. Full range across all 197 offers: USD 302–900. We found 45% of 197 offers from budget carriers (around USD 547) and 55% from full-service carriers (around USD 574).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Los Angeles → St Louis
Based on 197 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Los Angeles → St Louis
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier | — | — | — |
| Southwest | — | USD 90 | — |
| United | — | USD 95 | — |
| American Airlines | Included | USD 35 | — |
| Delta | — | USD 90 | — |
| Southwest | Included | USD 90 | — |
| Delta | Included | USD 35 | — |
| United | Included | USD 35 | — |
| Alaska Airlines | — | — | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Los Angeles to St Louis cost?
Based on 197 offers · November 2026
Los Angeles to St Louis flights ranged from USD 302 to USD 900 across 197 offers analyzed in November 2026. Two fare clusters detected: budget fares around 571 and premium fares around 811 The chart below shows how prices distributed across all 197 offers.
These 197 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 507 and USD 592
What hidden fees do Los Angeles to St Louis flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Los Angeles to St Louis routes. The breakdown below is based on 197 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 98 | 24% |
| Southwest | 90 | 17% |
| United | 129 | 28% |
| AA | 54 | 10% |
| Delta | 90 | 17% |
| WN | 30 | 5% |
| DL | 56 | 10% |
| UA | 47 | 8% |
| AS | 28 | 4% |
United: base ~USD 334 + fees USD 129 = ~USD 463 total. Alaska Airlines: base ~USD 716 + fees USD 28 = ~USD 744 total.
United's USD 129 ancillary fees narrow the gap with Alaska Airlines's lower-fee model — the USD 382 base difference shrinks to USD 281 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Los Angeles to St Louis?
10 airlines flew Los Angeles to St Louis in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (Frontier), fares ranged USD 306–442 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier | 4 | 306–442 | 341 | n/a |
 Frontier Airlines | 6 | 364–470 | 372 | 98 (26%) |
 United | 7 | 403–491 | 463 | 129 (28%) |
 American Airlines | 48 | 498–562 | 507 | 54 (11%) |
 Southwest | 15 | 443–554 | 528 | 90 (17%) |
 Delta | 1 | — | 533 | 90 (17%) |
 Delta Air Lines | 7 | 547–628 | 547 | 56 (10%) |
 United Airlines | 20 | 563–580 | 574 | 47 (8%) |
 Southwest Airlines | 87 | 567–822 | 592 | 30 (5%) |
 Alaska Airlines | 2 | 618–869 | 744 | 28 (4%) |
Where do the best Los Angeles → St Louis prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Los Angeles to St Louis flights
- Full-service carriers on Los Angeles–St Louis cost 1.2x more than budget airlines (USD 561 vs USD 458 median; overall median USD 570).
- United charges 4.7x more in ancillary fees than AS — USD 129 vs USD 28 avg per booking.
- The same route priced USD 291 apart depending on where it was booked — the lowest median was USD 502. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Los Angeles to St Louis cost?
- Based on 197 offers analyzed, Los Angeles to St Louis flights range from USD 302 to USD 900, with a median price of USD 570. Search for your specific dates →
- What hidden fees should I expect on Los Angeles to St Louis flights?
- On average, ancillary fees (bags, seat selection) add USD 49 to the base fare on Los Angeles to St Louis flights. See itemized fees for your itinerary →
- Which airline is cheapest on Los Angeles to St Louis including all fees?
- Frontier has the lowest median fare on Los Angeles to St Louis at USD 341 (median across 4 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Los Angeles–St Louis flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 502. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Los Angeles to St Louis routes?
- Los Angeles to St Louis has 10 airlines competing, creating a price range from USD 302 to USD 900 across 197 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
10 airlines, two price clusters — find which fits your budget
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