Cheap Flights to Washington County

View AU$754 flight on Wed, 21 Jan 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Alaska Airlines

    Alaska Airlines

  • Air Canada

    Air Canada

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Cheapest Flights to Washington County

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 19 Feb - Wed, 25 Feb
BNE
Brisbane
STL
St. Louis
AU$1,188 Return, found 5 days ago
AU$1,188
Return
found 5 days ago
Select Air Canada flight, departing Thu, 19 Feb from Brisbane to St. Louis, returning Wed, 25 Feb, priced at AU$1,188 found 5 days ago
Air Canada
Sat, 31 Jan - Sat, 7 Feb
BNE
Brisbane
STL
St. Louis
AU$1,256 Return, found 1 day ago
AU$1,256
Return
found 1 day ago
Select Air Canada flight, departing Sat, 31 Jan from Brisbane to St. Louis, returning Sat, 7 Feb, priced at AU$1,256 found 1 day ago
American Airlines
Sat, 31 Jan - Sat, 7 Feb
BNE
Brisbane
STL
St. Louis
AU$1,257 Return, found 1 day ago
AU$1,257
Return
found 1 day ago
Select American Airlines flight, departing Sat, 31 Jan from Brisbane to St. Louis, returning Sat, 7 Feb, priced at AU$1,257 found 1 day ago
Delta
Sun, 1 Feb - Sun, 8 Feb
BNE
Brisbane
STL
St. Louis
AU$1,272 Return, found 1 day ago
AU$1,272
Return
found 1 day ago
Select Delta flight, departing Sun, 1 Feb from Brisbane to St. Louis, returning Sun, 8 Feb, priced at AU$1,272 found 1 day ago
United
Tue, 10 Mar - Tue, 26 May
BNE
Brisbane
COU
Columbia
AU$1,273 Return, found 1 day ago
AU$1,273
Return
found 1 day ago
Select United flight, departing Tue, 10 Mar from Brisbane to Columbia, returning Tue, 26 May, priced at AU$1,273 found 1 day ago
United
Mon, 2 Feb - Mon, 9 Feb
BNE
Brisbane
STL
St. Louis
AU$1,273 Return, found 1 day ago
AU$1,273
Return
found 1 day ago
Select United flight, departing Mon, 2 Feb from Brisbane to St. Louis, returning Mon, 9 Feb, priced at AU$1,273 found 1 day ago
Qantas Airways
Tue, 27 Jan - Tue, 3 Feb
BNE
Brisbane
STL
St. Louis
AU$1,280 Return, found 1 day ago
AU$1,280
Return
found 1 day ago
Select Qantas Airways flight, departing Tue, 27 Jan from Brisbane to St. Louis, returning Tue, 3 Feb, priced at AU$1,280 found 1 day ago
United
Wed, 24 Dec - Fri, 2 Jan
MEL
Melbourne
STL
St. Louis
AU$1,319 Return, found 3 days ago
AU$1,319
Return
found 3 days ago
Select United flight, departing Wed, 24 Dec from Melbourne to St. Louis, returning Fri, 2 Jan, priced at AU$1,319 found 3 days ago
United
Fri, 6 Mar - Fri, 20 Mar
MEL
Melbourne
COU
Columbia
AU$1,319 Return, found 10 hours ago
AU$1,319
Return
found 10 hours ago
Select United flight, departing Fri, 6 Mar from Melbourne to Columbia, returning Fri, 20 Mar, priced at AU$1,319 found 10 hours ago
Jetstar
Sat, 24 Jan - Sat, 31 Jan
AVV
Melbourne
STL
St. Louis
AU$1,381 Return, found 1 day ago
AU$1,381
Return
found 1 day ago
Select Jetstar flight, departing Sat, 24 Jan from Melbourne to St. Louis, returning Sat, 31 Jan, priced at AU$1,381 found 1 day ago

Washington County Flights

When was the last time you embarked on a grand adventure? Whether it was last month or years ago, there’s never been a better time to start planning your next big trip. Book tickets to Washington County today and get ready to build your travel itinerary, from exploring the area with your family to recharging in the change of scenery. During your stay, visit the must-see attractions, chow down on the local cuisine, and relish in a holiday state of mind. However you decide to spend your upcoming trip, we’re here to make your travel plans easy and affordable.

Book Your Washington County Airfare

At Expedia.com.au, it’s simple to find cheap flights to Washington County that won’t cause your wallet to flinch. Browse through our inventory of Washington County flights and find airfare matching your preferred times and dates. Looking for a red-eye flight or an afternoon departure? Don’t worry, we’ve got you covered. You can even take advantage of our convenient My Scratchpad online feature, which lets you track your search results with ease. No more excuses; book your travel arrangements with us today to make your dream trip a reality.

Washington County Flights Information

Airlines serving
Air Canada, American Airlines, United, Qantas Airways, Delta, Jetstar
Roundtrip price
from AU$1,188

Frequently asked questions

How do I find cheap flights to Washington County that have flexible change policies?
At Expedia, we've been channeling our inner yogi to provide you with the most flexible airfares on the market. Just check the "No change fee" box right under the filter heading "Flexible change policies" to find your dream flight to Washington County.
Which airlines fly to Washington County?
With a great range of airlines operating flights into or near Washington County, you're not short on choice:

  • Southwest Airlines - 2 214 flights to or near Washington County each month, including 2 214 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • American Airlines - 789 flights to or near Washington County each month, including 789 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • Delta Air Lines - 650 flights to or near Washington County each month, including 650 flights to Lambert-St. Louis Intl. Airport (STL) per month.

How can I find cheap tickets to Washington County?
You'll always nab an amazing deal with Expedia, but our "flexible dates" feature makes it that much easier. Enter your preferred travel date, then click on the flexible dates box above to compare prices for nearby days. AU$1,188 was the best price for a flight to Washington County in the last seven days.
How much is a flight to Washington County?
You could have scored a return ticket to Washington County from anywhere between AU$1,188 and AU$1,381 in the last seven days. For one-way trips departing from Brisbane (BNE), the lowest amount paid during this time was AU$754.
What are the most popular airports to fly into in Washington County?
Book your flight to Lambert-St. Louis Intl. Airport (STL) and sample the best that Washington County has to offer. As the region's primary entry point, approximately 4 902 flights touch down here every month.
When is the cheapest time to fly to Washington County?
Fly out on a Tuesday to raise your chances of landing the cheapest flight to Washington County. Mondays are usually the next most affordable day to depart. Saturday is typically the costliest day to fly anywhere.
How much is a plane ticket to Washington County?
Fares to Washington County varied from AU$1,188 to AU$1,381 in the last seven days. Generally, the sooner you make a reservation, the better the deal.
What is the best time to go to Washington County?
July, August and September are the most popular months to venture to Sullivan, one of Washington County's most interesting cities. Summertime here starts June 20. Average temperatures vary from 18ºC to 29ºC across this season, so organise your travels around then if you're into warmer weather.
What months are the cheapest to book a flight to Washington County?
February is the ideal month to bag an awesome deal to Washington County. Keep in mind that the most expensive time to make a booking in the States isn't during the height of summer, but the month of December.

Trending flights to Washington County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 19 Feb - Wed, 25 Feb
BNE
Brisbane
STL
St. Louis
AU$1,188 Return, found 5 days ago
AU$1,188
Return
found 5 days ago
Select Air Canada flight, departing Thu, 19 Feb from Brisbane to St. Louis, returning Wed, 25 Feb, priced at AU$1,188 found 5 days ago
*Available to Expedia members.