Flights London → St Louis
As of November 2026, economy flights from London to St Louis have a typical range USD 682–1646, median USD 729. Full range across all 252 offers: USD 606–12871. We analyzed 252 offers from 32 airlines in a single price check.
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: London → St Louis
Based on 252 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: London → St Louis
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| SWISS | Included | — | — |
| Air Canada | Included | USD 30 | — |
| Iberia | Included | USD 30 | — |
| Austrian Airlines | Included | USD 35 | — |
| Lufthansa | Included | USD 35 | — |
| British Airways | Included | USD 65 | — |
| Finnair | Included | USD 30 | — |
| United | Included | USD 35 | — |
| Virgin Atlantic | Included | Included | — |
| Air France | Included | USD 35 | — |
| KLM | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| Aer Lingus | — | Included | — |
| WestJet | Included | USD 32 | — |
| Alaska Airlines | Included | USD 35 | — |
| Icelandair | Included | Included | — |
| Turkish Airlines | Included | Included | — |
| Scandinavian Airlines | Included | USD 30 | — |
| Avianca | Included | Included | — |
| Cathay Pacific | Included | Included | — |
| Egyptair | Included | Included | — |
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 London to St Louis cost?
Based on 252 offers · November 2026
London to St Louis flights ranged from USD 606 to USD 12871 across 252 offers analyzed in November 2026. The chart below shows how prices distributed across all 252 offers.
These 252 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 697 and USD 1044
What hidden fees do London to St Louis flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on London to St Louis routes. The breakdown below is based on 252 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| LX | 16 | 3% |
| AC | 41 | 5% |
| IB | 41 | 6% |
| OS | 45 | 5% |
| LH | 45 | 6% |
| BA | 76 | 8% |
| AY | 35 | 5% |
| UA | 51 | 7% |
| VS | 20 | 2% |
| AF | 62 | 9% |
| KL | 60 | 8% |
| DL | 45 | 4% |
| AA | 45 | 6% |
| EI | 35 | 4% |
| WS | 48 | 5% |
| AS | 45 | 4% |
| FI | 13 | 1% |
| TK | 10 | 1% |
| SK | 40 | 1% |
| AV | 13 | 0% |
| CX | 67 | 1% |
| MS | 11 | 0% |
British Airways: base ~USD 654 + fees USD 76 = ~USD 730 total. Turkish Airlines: base ~USD 1302 + fees USD 10 = ~USD 1312 total.
British Airways's USD 76 ancillary fees narrow the gap with Turkish Airlines's lower-fee model — the USD 648 base difference shrinks to USD 582 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.BA charges 7.6x more in ancillary fees than TK on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from London to St Louis?
32 airlines flew London to St Louis in this dataset. 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.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 FR|EI | 1 | — | 606 | n/a |
 Swiss | 1 | — | 641 | 16 (3%) |
 Lufthansa | 4 | 652–653 | 653 | n/a |
 Brussels Airlines | 7 | — | 653 | n/a |
 Iberia | 2 | 670–680 | 675 | n/a |
 Iberia | 18 | 674–855 | 693 | 41 (6%) |
 Finnair | 10 | 686–709 | 693 | 35 (5%) |
 Air France | 6 | 703–732 | 703 | 62 (9%) |
 KLM | 10 | 703–739 | 703 | 60 (9%) |
 United Airlines | 15 | 687–941 | 708 | 51 (7%) |
 Lufthansa | 24 | 687–752 | 711 | 45 (6%) |
 British Airways | 6 | 707–934 | 713 | n/a |
 Air Canada | 20 | 675–1140 | 722 | 41 (6%) |
 Austrian | 8 | 684–1051 | 724 | 45 (6%) |
 British Airways | 17 | 686–1193 | 730 | 76 (10%) |
 American | 1 | — | 755 | n/a |
 American Airlines | 7 | 703–859 | 769 | 45 (6%) |
 Eurowings | 1 | — | 802 | n/a |
 Aer Lingus | 9 | 749–924 | 803 | 35 (4%) |
 KLM | 3 | 781–883 | 883 | n/a |
 Delta Air Lines | 26 | 703–1559 | 939 | 45 (5%) |
 WestJet | 1 | — | 966 | 48 (5%) |
 Alaska Airlines | 1 | — | 1017 | 45 (4%) |
 Icelandair | 2 | 1058–1164 | 1111 | 13 (1%) |
 Turkish Airlines | 2 | — | 1279 | n/a |
 Virgin Atlantic | 31 | 703–1728 | 1309 | 20 (2%) |
 Turkish Airlines | 2 | 1311–1313 | 1312 | 10 (1%) |
 SWISS | 12 | 660–6074 | 1523 | n/a |
 SAS | 1 | — | 2968 | 40 (1%) |
 Avianca | 1 | — | 7206 | 13 (0%) |
 Cathay Pacific | 1 | — | 8867 | 67 (1%) |
 EgyptAir | 2 | 12870–12871 | 12871 | 11 (0%) |
Where do the best London → 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 meta-search 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: London to St Louis flights
- Full-service carriers on London–St Louis cost 1.8x more than budget airlines (USD 1766 vs USD 966 median; overall median USD 729).
- BA charges 7.6x more in ancillary fees than TK — USD 76 vs USD 10 avg per booking.
- The same route priced USD 150 apart depending on where it was booked — the lowest median was USD 606. 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 London to St Louis cost?
- Based on 252 offers analyzed, London to St Louis flights range from USD 606 to USD 12871, with a median price of USD 729. Search for your specific dates →
- What hidden fees should I expect on London to St Louis flights?
- On average, ancillary fees (bags, seat selection) add USD 43 to the base fare on London to St Louis flights. See itemized fees for your itinerary →
- Which airline is cheapest on London to St Louis including all fees?
- FR|EI has the lowest median fare on London to St Louis at USD 606 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest London–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 606. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on London to St Louis routes?
- London to St Louis has 32 airlines competing, creating a price range from USD 606 to USD 12871 across 252 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
32 airlines compete on this route — we check every one
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