Question 1

Which is the best airline for flights from Washington, D.C. to St. Louis, Delta or United Airlines?

Accepted Answer

The two airlines most popular with KAYAK users for flights from Washington, D.C. to St. Louis are Delta and United Airlines. With an average price for the route of $405 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $545 and an overall rating of 7.4.

Question 2

How long does a flight from Washington Dulles Airport to St. Louis take?

Accepted Answer

Direct flights cover the 694 miles separating Washington Dulles Airport to St. Louis in about 2h 27m.

Question 3

How many flights are there between Washington, D.C. Dulles Intl Airport and St. Louis per day?

Accepted Answer

Each day, there are between 2 and 3 nonstop flights that take off from Washington, D.C. Dulles Intl Airport and land in St. Louis, with an average flight time of 2h 20m. The most common departure time is 5:00 pm and most flights take off in the morning. Each week, there are 15 flights. The most frequent day of departure is Monday, when 20% of all weekly flights depart. The fewest flights depart on a Tuesday.

Question 4

How many flights are there between Washington, D.C. Dulles Intl Airport and St. Louis per day?

Accepted Answer

Each day, there are between 2 and 3 nonstop flights that take off from Washington, D.C. Dulles Intl Airport and land in St. Louis, with an average flight time of 2h 20m. The most common departure time is 5:00 pm and most flights take off in the morning. Each week, there are 15 flights. The most frequent day of departure is Monday, when 20% of all weekly flights depart. The fewest flights depart on a Tuesday.

Question 5

What is the cheapest flight from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to St. Louis was $64 for a one-way ticket and $244 for a round-trip.

Question 6

Do I need a passport to fly between Washington Dulles Airport and St. Louis?

Accepted Answer

No, a passport isn't needed to fly from Washington Dulles Airport to St. Louis. However, local authorities might ask for an official ID.

Question 7

What’s the cheapest day of the week to fly from Washington Dulles Airport to St. Louis?

Accepted Answer

For Washington Dulles Airport to St. Louis, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Washington Dulles Airport, the best deals are generally found on Wednesday, with Thursday being the most expensive.

Question 8

What’s the cheapest day of the week to fly from Washington Dulles Airport to St. Louis?

Accepted Answer

For Washington Dulles Airport to St. Louis, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Washington Dulles Airport, the best deals are generally found on Wednesday, with Thursday being the most expensive.

Question 9

Which airports will I be using when flying from Washington Dulles Airport to St. Louis?

Accepted Answer

When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at St. Louis, also known as Lambert-St Louis.

Question 10

What’s the earliest departure time from Washington Dulles Airport to St. Louis?

Accepted Answer

Early birds can take the earliest flight from Washington, D.C. Dulles Intl Airport at 8:25 am and will be landing in St. Louis at 9:39 am.

Question 11

What’s the latest departure time from Washington Dulles Airport to St. Louis?

Accepted Answer

If you prefer to fly at night, the latest flight from Washington, D.C. Dulles Intl Airport to St. Louis jets off at 10:10 pm and lands at 11:32 pm.

Question 12

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport and St. Louis?

Accepted Answer

There are 2 airlines that fly nonstop from Washington, D.C. Dulles Intl Airport to St. Louis. They are American Airlines and United Airlines. The cheapest airline for this route is American Airlines, with the best round-trip deal found costing $254. On average, the best prices for this route can be found at American Airlines.

Question 13

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport and St. Louis?

Accepted Answer

There are 2 airlines that fly nonstop from Washington, D.C. Dulles Intl Airport to St. Louis. They are American Airlines and United Airlines. The cheapest airline for this route is American Airlines, with the best round-trip deal found costing $254. On average, the best prices for this route can be found at American Airlines.

Question 14

Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to St. Louis?

Accepted Answer

Only American Airlines offers inflight Wi-Fi service on the Washington Dulles Airport to St. Louis flight route.

Question 15

Which aircraft models fly most regularly from Washington Dulles Airport to St. Louis?

Accepted Answer

The Canadair (Bombardier) Regional Jet CRJ-550 is the aircraft model that flies most regularly on the Washington Dulles Airport to St. Louis flight route.

Question 16

Which airline alliances offer flights from Washington Dulles Airport to St. Louis?

Accepted Answer

oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and St. Louis, with oneworld being the most commonly used for this route.

Question 17

On which days can I fly direct from Washington Dulles Airport to St. Louis?

Accepted Answer

There are nonstop flights from Washington Dulles Airport to St. Louis on a daily basis.

Question 18

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to St. Louis is January, where tickets cost $349 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $636 and $635 respectively.

Question 19

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to St. Louis is January, where tickets cost $349 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $636 and $635 respectively.

Question 20

How does KAYAK find such low prices on flights from Washington Dulles Airport to St. Louis?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to St. Louis.

Question 21

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to St. Louis?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

Question 22

What is the Hacker Fare option on flights from Washington Dulles Airport to St. Louis?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and STL can sometimes prove cheaper using this method.

Question 23

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to St. Louis?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Question 24

What is the cheapest layover airport when flying from Washington Dulles Airport to St. Louis?

Accepted Answer

Flights via Charlotte (CLT) offer the most affordable fares, with an average round-trip price of $353.

Question 25

What is the most popular layover airport when flying from Washington Dulles Airport to St. Louis?

Accepted Answer

Atlanta (ATL) is the top choice – 50% of KAYAK users who clicked on 1-stop flights from Washington Dulles Airport to St. Louis picked an itinerary connecting there.

Question 26

Which layover airport has the quickest connection when flying from Washington Dulles Airport to St. Louis?

Accepted Answer

If you prefer a quick connection, Chicago (ORD) often has the shortest layovers from Washington Dulles Airport to St. Louis, with an average of 1h 18m.

Question 27

Which layover airport offers the shortest total travel time from Washington Dulles Airport to St. Louis?

Accepted Answer

Consider flying via Detroit (DTW) for the shortest journey. The average one-way travel time for flights connecting there is 4h 55m.

Question 28

Which cabin class options are there for flights between Washington, D.C. Dulles Intl Airport and St. Louis?

Accepted Answer

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 29

Which cabin class options are there for flights between Washington, D.C. Dulles Intl Airport and St. Louis?

Accepted Answer

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 30

Which airlines provide the cheapest flights from Washington Dulles Airport to St. Louis?

Accepted Answer

In the past 5 days, the cheapest round-trip tickets from Washington Dulles Airport to St. Louis were found on Frontier ($244) and United Airlines ($247).

Question 31

Which airlines provide the cheapest flights from Washington Dulles Airport to St. Louis?

Accepted Answer

In the past 5 days, the cheapest round-trip tickets from Washington Dulles Airport to St. Louis were found on Frontier ($244) and United Airlines ($247).

Question 32

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

No, with an average price for the route of $532, prices are generally cheapest when you fly direct.

Question 33

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

No, with an average price for the route of $532, prices are generally cheapest when you fly direct.

Question 34

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to St. Louis?

Accepted Answer

Flight prices are below average for this route right now.Flights to St. Louis from Washington, D.C. Dulles Intl Airport usually cost between $312 and $616 in September.
The lowest price found in the past 5 days was $244 on Frontier (Sep 11-Sep 13).

Question 35

What are the most popular airlines flying to St. Louis?

Accepted Answer

The most popular airline among KAYAK users flying to St. Louis is United Airlines, followed by Delta and Frontier.

Low season	February
High season	June
Cheapest flight	$64

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Cheap Flights from Dulles Intl to St. Louis (IAD-STL)

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How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to St. Louis?

What’s the cheapest day of the week to fly from Washington Dulles Airport to St. Louis?

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to St. Louis?

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to St. Louis?

Which airlines provide the cheapest flights from Washington Dulles Airport to St. Louis?

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport and St. Louis?

What is the most popular layover airport when flying from Washington Dulles Airport to St. Louis?

What is the cheapest layover airport when flying from Washington Dulles Airport to St. Louis?

Which layover airport offers the shortest total travel time from Washington Dulles Airport to St. Louis?

Which layover airport has the quickest connection when flying from Washington Dulles Airport to St. Louis?

Which cabin class options are there for flights between Washington, D.C. Dulles Intl Airport and St. Louis?

How many flights are there between Washington, D.C. Dulles Intl Airport and St. Louis per day?

How long does a flight from Washington Dulles Airport to St. Louis take?

What’s the earliest departure time from Washington Dulles Airport to St. Louis?

What’s the latest departure time from Washington Dulles Airport to St. Louis?

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