Cheap flights to Washington County

View €510 flight on Thu, 11 Jun 2026Opens in a new window

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Popular airlines to Washington County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Alaska Airlines

  • Air Canada

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Cheap round-trip flights to Washington County

Prices were available within the past 7 days and start at €510 for one-way flights and €715 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,080 Return, found 15 hours ago
€1,080
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,080 found 15 hours ago
British Airways
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,083 Return, found 15 hours ago
€1,083
Return
found 15 hours ago
Select British Airways flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,083 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,085 Return, found 15 hours ago
€1,085
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,085 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,096 Return, found 15 hours ago
€1,096
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,096 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,099 Return, found 15 hours ago
€1,099
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,099 found 15 hours ago
British Airways
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,102 Return, found 15 hours ago
€1,102
Return
found 15 hours ago
Select British Airways flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,102 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,104 Return, found 15 hours ago
€1,104
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,104 found 15 hours ago
British Airways
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,107 Return, found 15 hours ago
€1,107
Return
found 15 hours ago
Select British Airways flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,107 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,109 Return, found 15 hours ago
€1,109
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,109 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,111 Return, found 15 hours ago
€1,111
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,111 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,115 Return, found 15 hours ago
€1,115
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,115 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,120 Return, found 15 hours ago
€1,120
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,120 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,130 Return, found 15 hours ago
€1,130
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,130 found 15 hours ago
Aer Lingus
Mon, 11 May - Mon, 18 May
NOC
Knock
COU
Columbia
€1,132 Return, found 15 hours ago
€1,132
Return
found 15 hours ago
Select Aer Lingus flight, departing Mon, 11 May from Knock to Columbia, returning Mon, 18 May, priced at €1,132 found 15 hours ago

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.

American Airlines
Thu, 12 Nov - Tue, 17 Nov
DUB
Dublin
COU
Columbia
€715 Return, found 2 days ago
€715
Return
found 2 days ago
Select American Airlines flight, departing Thu, 12 Nov from Dublin to Columbia, returning Tue, 17 Nov, priced at €715 found 2 days ago

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. €715 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 €715 and €1,673 in the last seven days. For one-way trips departing from Knock (NOC), the lowest amount paid during this time was €510.
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.
How much is a plane ticket to Washington County?
Fares to Washington County varied from €715 to €1,673 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.

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About Washington County

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About Washington County

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