Cheapest€98.08
- PSA Airlines PS135720:132h 6m22:19Washington DCASt. Louis STL
Door to door 5h 16mCO2 289.1 kgChanges 0Fixed, no changes
Traveling from Washington D.C. to St Louis costs €98.08 at the cheapest and takes 5h 3m door to door at the fastest, across 1 mode and 5 operators. The route covers 1,175 km. Cheapest is by flight, fastest is by flight.
At a glance
- Distance
- 1,175 km
- Fastest
- 5h 3m
- Average
- 5h 10m
- Services per day
- 40
- Cheapest
- €98.08
- CO2 per passenger
- 289.1 kg
Every way to make this journey
Journey times below are door to door, so they include getting to the terminal and away from it at the other end. Fares are the cheapest we currently sell on September 29, 2026.
| Mode | Door to door | Moving | At the ends | From | CO2 | Per day |
|---|---|---|---|---|---|---|
| Flight | 5h 4m | 1h 54m | 3h 10m | €114.60 | 289.1 kg | 40 |
- 5h 4mFastest, by Flight
- €114.60Cheapest, by Flight
- 289.1 kgLowest CO2, by Flight
- 1,175 kmDistance traveled
The cheapest and the fastest on September 29, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€104.57
- Southwest Airlines SA909416:041h 54m17:58Washington IADSt. Louis STL
Door to door 5h 4mCO2 289.1 kgChanges 0Fixed, no changes
Today's real departures
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
Checking the live timetables.
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
Prices over the next three weeks
Live from our own engine, refreshed on every request. The cheapest days for each way of traveling are marked.
| Cheapest fare by mode and day for Washington D.C. to St Louis | SunSep 13 | MonSep 14 | TueSep 15 | WedSep 16 | ThuSep 17 | FriSep 18 | SatSep 19 | SunSep 20 | MonSep 21 | TueSep 22 | WedSep 23 | ThuSep 24 | FriSep 25 | SatSep 26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flight | €234.37 | €175.37 | €171.83 | €150.59 | €189.53 | €174.78 | €180.68 | €134.66 | €122.27 | €114.60 | €122.86 | €152.95 | €142.92 | €145.28 |
Cheapest day: 2026-09-29 · €98.08
Arriving in September changes what you want from a room in St Louis. It is not a thing we sell, so here is who does.
Rooms within reach of Union Station
Hotels and apartments near downtown, most of them with free cancellation, on a map that shows what is walkable.
Search St Louis on Booking.comOr compare on Expedia
Partner links. We do not sell accommodation. We earn a commission when a booking completes, and it never changes what you pay.
When to book Washington D.C. to St Louis
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €116.3790 days
- €79.7960 days
- €78.6145 days
- €80.3830 days
- €114.0121 days
- €145.2814 days
- €180.687 days
- €171.833 days
- €234.371 days
- Cheapest lead time
- Fares bottom out around 45 days ahead, at €78.61.
- How much it moves
- The gap between the cheapest and most expensive lead time is 198 percent. The most expensive point is €234.37, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 45 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Book now Fares on this route are lowest around 45 days ahead. You are inside that window.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €134.66Sun
- €122.27Mon
- €114.60Tue
- €122.86Wed
- €152.95Thu
- €142.92Fri
- €145.28Sat
How the fare moves month by month
The same journey priced on the fifteenth of each of the next six months.
- €171.83Sep
- €104.57Oct
- €94.54Nov
- €92.77Dec
- €91.00Jan
- €78.61Feb
The route
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- How far it really runs
- The route covers 1,175 km against 1,141 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- First and last departure
- The first service of the day leaves Washington D.C. at 06:20 and the last at 20:53, across 40 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Washington
Rail
- Washington Union Station
- L'Enfant
- Seabrook
Bus
- Washington Union Station
- Washington Deluxe Bus
Air
- IAD
- DCA
Ferry
- City Cruises Washington DC
- The Wharf Ferry Landing
St. Louis
Rail
- Union Station
- Delmar Boulevard station
- Cotton Belt Freight Depot
Bus
- St. Louis Bus Station
- Clayton Transit Center
Air
- STL
Who runs this route
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From |
|---|---|
 GoJet Airlines | €102.21 |
 PSA Airlines | €98.08 |
 Republic Airways | €98.67 |
 Southwest Airlines | €99.85 |
| United Airlines | €98.08 |
What the fare is made of
Every part of the total, so the number at checkout is the number here.
| Part | Amount | Share |
|---|---|---|
| Operator fare | €75.50 | 77% |
| Taxes | €13.59 | 14% |
| Supplier fees | €7.00 | 7% |
| Our service fee | €1.99 | 2% |
| Total you pay | €98.08 | 100% |
A day in St Louis hauling a suitcase is a shorter day than it needs to be. We do not store bags.
Where to leave your bags in St Louis
Priced by the bag and by the day, booked before you get there, and insured while it sits.
Check St Louis on StasherOr try Bounce
Partner links. We do not run these networks. We earn a commission on a booking, and the price is the same as going direct.
Questions about Washington D.C. to St Louis
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does it take to get from Washington D.C. to St Louis?
The fastest journey from Washington D.C. to St Louis takes 5h 3m door to door, of which 1h 54m is spent moving, on the flight. Most services take around 5h 10m, because that average includes slower stopping services and journeys with a connection. Times include reaching the terminal and leaving it at the far end.
How much does it cost to travel from Washington D.C. to St Louis?
The cheapest fare from Washington D.C. to St Louis is €98.08, checked on September 12, 2026. A typical fare across the next three weeks is €162.98. Both figures are the total for one passenger, including taxes, supplier fees and our service fee, so nothing is added at checkout.
What is the cheapest way to get from Washington D.C. to St Louis?
The cheapest way from Washington D.C. to St Louis is by flight, at €114.60 for one passenger on September 29, 2026. That journey takes 5h 4m door to door. Cheaper is rarely faster on this corridor, and the comparison table on this page shows what each mode costs against what it saves.
When should I book Washington D.C. to St Louis?
Fares from Washington D.C. to St Louis bottom out around 45 days before departure, at €78.61. Across the whole booking window the gap between the cheapest and the most expensive lead time is 198 percent, measured on September 12, 2026. Booking inside the last week has consistently cost more on this corridor.
Which day of the week is cheapest for Washington D.C. to St Louis?
Tuesday is the cheapest day to depart from Washington D.C. to St Louis, at €114.60. That is the median of 21 priced departure days across the next three weeks, checked on September 12, 2026. Shifting a departure by one day is usually worth more than shifting the booking by one week.
Which month is cheapest for Washington D.C. to St Louis?
February is the cheapest of the next 6 months to travel from Washington D.C. to St Louis, at €78.61 for one passenger. Each month is priced on its fifteenth, so the comparison is like for like rather than a mix of weekends and midweek departures.
Who runs service from Washington D.C. to St Louis?
5 operators sell services from Washington D.C. to St Louis across 1 mode: GoJet Airlines, PSA Airlines, Republic Airways, Southwest Airlines, United Airlines. Journey times, fares and fare conditions differ between them, and the operator table on this page compares all of them on speed, flexibility and what is provided on board.
Is there a direct service from Washington D.C. to St Louis?
Every service we sell from Washington D.C. to St Louis is direct, with around 40 departures a day and a fastest journey of 5h 3m door to door. No connection is needed, so there is no missed connection risk to plan around on this corridor.
Which station or terminal do services from Washington D.C. to St Louis use?
Services from Washington D.C. to St Louis by flight leave from Washington IAD and arrive at St. Louis STL. Allow about 3h 10m in total for reaching the departure terminal and leaving the arrival one, which is already included in every door to door time on this page.
Can I change or refund a ticket from Washington D.C. to St Louis?
0 of the 5 operators we sell from Washington D.C. to St Louis allow a change or a refund. A change on a changeable fare costs €5.00. The operator table on this page names which is which, and the condition is shown again before you pay.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon, Distances
- On this page
- Every figure above was computed for Washington D.C. to St Louis on September 12, 2026: 1175 km of route against 1141 km in a straight line, 40 services a day, 5 operators, a cheapest fare of €98.08, and 5h 3m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
Plenty of what is worth seeing sits outside St Louis and elsewhere in United States. None of it is ours to sell.
What to book in St Louis before you go
Timed entry, guided walks and half-day trips out of St Louis, with free cancellation on most of it.
See St Louis on GetYourGuideOr browse Viator
Partner links. We do not sell tours or tickets. We earn a commission on a booking, and it never changes the price.
Other ways to make this journey
Leaving Washington D.C.
Washington D.C. to AtlantaWashington D.C. to MinneapolisWashington D.C. to TorontoWashington D.C. to NashvilleWashington D.C. to DetroitWashington D.C. to BuffaloWashington D.C. to OrlandoWashington D.C. to RochesterWashington D.C. to ChicagoWashington D.C. to WarwickWashington D.C. to MontrealWashington D.C. to Houston
Arriving in St Louis
Leaving St Louis
- 76Places you can leave for
- 5Countries
- 22Operators
Plan a trip from here
Ask Ori for the same corridor under a different constraint, or for a longer trip that starts on it.