Flights London → St Louis
As of November 2026, economy flights from London to St Louis have a typical range USD 685–803, median USD 703. Full range across all 124 offers: USD 635–4228. We analyzed 124 offers from 19 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 124 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 |
|---|---|---|---|
| Lufthansa | — | — | — |
| Air Canada | — | — | — |
| Austrian Airlines | — | — | — |
| Iberia | — | — | — |
| British Airways | — | — | — |
| Finnair | — | USD 79 | — |
| United | — | — | — |
| Virgin Atlantic | — | — | — |
| KLM | — | USD 78 | — |
| Air France | — | USD 78 | — |
| Delta | — | USD 78 | — |
| American Airlines | — | — | — |
| Aer Lingus | — | — | — |
| 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 London to St Louis cost?
Based on 124 offers · November 2026
London to St Louis flights ranged from USD 635 to USD 4228 across 124 offers analyzed in November 2026. The chart below shows how prices distributed across all 124 offers.
These 124 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 689 and USD 747
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 124 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| LH | 12 | 2% |
| AC | 12 | 2% |
| OS | 20 | 3% |
| IB | 30 | 4% |
| BA | 15 | 1% |
| AY | 70 | 10% |
| UA | 16 | 2% |
| VS | 20 | 3% |
| KL | 90 | 13% |
| AF | 101 | 14% |
| DL | 88 | 13% |
| AA | 10 | 1% |
| EI | 8 | 1% |
| AS | 10 | 1% |
Air France: base ~USD 602 + fees USD 101 = ~USD 703 total. Aer Lingus: base ~USD 827 + fees USD 8 = ~USD 835 total.
Air France's USD 101 ancillary fees narrow the gap with Aer Lingus's lower-fee model — the USD 225 base difference shrinks to USD 132 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 London to St Louis?
19 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) |
|---|---|---|---|---|
 BA|EI | 1 | — | 635 | n/a |
 Air Canada | 2 | — | 666 | 12 (2%) |
 American | 6 | 689–722 | 689 | n/a |
 British Airways | 3 | 689–742 | 689 | n/a |
 United | 7 | 689–710 | 689 | n/a |
 Finnair | 7 | 686–720 | 691 | 70 (10%) |
 Iberia | 11 | 684–841 | 693 | 30 (4%) |
 Virgin Atlantic | 6 | 703–736 | 703 | 20 (3%) |
 KLM | 7 | 703–716 | 703 | 90 (13%) |
 Air France | 6 | 703–732 | 703 | 101 (14%) |
 Delta Air Lines | 6 | — | 703 | 88 (13%) |
 Virgin Atlantic | 1 | — | 705 | n/a |
 United Airlines | 12 | 687–1035 | 707 | 16 (2%) |
 Lufthansa | 18 | 685–757 | 707 | 12 (2%) |
 British Airways | 16 | 686–1271 | 719 | 15 (2%) |
 Austrian | 7 | 684–757 | 723 | 20 (3%) |
 American Airlines | 5 | 729–871 | 769 | 10 (1%) |
 Aer Lingus | 2 | 783–886 | 835 | 8 (1%) |
 Alaska Airlines | 1 | — | 1017 | 10 (1%) |
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
- London–St Louis had 124 offers analyzed. Median price: USD 703.
- AF charges 12.6x more in ancillary fees than EI — USD 101 vs USD 8 avg per booking.
- The same route priced USD 88 apart depending on where it was booked — the lowest median was USD 635. 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 124 offers analyzed, London to St Louis flights range from USD 635 to USD 4228, with a median price of USD 703. 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 34 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?
- BA|EI has the lowest median fare on London to St Louis at USD 635 (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 635. 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 19 airlines competing, creating a price range from USD 635 to USD 4228 across 124 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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