$405 Cheap Flights from Washington (IAD) to La Serena (LSC)

View $405 flight on Thu, Nov 20, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to La Serena (LSC-La Florida)

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Cheap Flights from Washington to La Serena (IAD-LSC)

Prices were available within the past 7 days and start at $405 for one-way flights and $837 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, Nov 23 - Tue, Dec 2
IAD
Washington
LSC
La Serena
$837 Roundtrip, found 3 days ago
$837
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Nov 23 from Washington to La Serena, returning Tue, Dec 2, priced at $837 found 3 days ago
LATAM Airlines Group
Tue, Nov 25 - Tue, Dec 2
IAD
Washington
LSC
La Serena
$854 Roundtrip, found 3 days ago
$854
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Tue, Nov 25 from Washington to La Serena, returning Tue, Dec 2, priced at $854 found 3 days ago
Air Canada
Tue, Nov 11 - Sat, Nov 15
IAD
Washington
LSC
La Serena
$1,246 Roundtrip, found 2 days ago
$1,246
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Nov 11 from Washington to La Serena, returning Sat, Nov 15, priced at $1,246 found 2 days ago
LATAM Airlines Group
Sat, Aug 8 - Thu, Aug 20
IAD
Washington
LSC
La Serena
$1,392 Roundtrip, found 1 day ago
$1,392
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Sat, Aug 8 from Washington to La Serena, returning Thu, Aug 20, priced at $1,392 found 1 day ago
LATAM Airlines Group
Sat, Aug 8 - Thu, Aug 20
IAD
Washington
LSC
La Serena
$1,398 Roundtrip, found 1 day ago
$1,398
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Sat, Aug 8 from Washington to La Serena, returning Thu, Aug 20, priced at $1,398 found 1 day ago
LATAM Airlines Group
Tue, Nov 11 - Sat, Nov 15
IAD
Washington
LSC
La Serena
$1,454 Roundtrip, found 2 days ago
$1,454
Roundtrip
found 2 days ago
Select LATAM Airlines Group flight, departing Tue, Nov 11 from Washington to La Serena, returning Sat, Nov 15, priced at $1,454 found 2 days ago
Aeromexico
Thu, Nov 20 - Sat, Nov 29
IAD
Washington
LSC
La Serena
$1,508 Roundtrip, found 1 day ago
$1,508
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Thu, Nov 20 from Washington to La Serena, returning Sat, Nov 29, priced at $1,508 found 1 day ago
Aeromexico
Thu, Nov 20 - Sat, Nov 29
IAD
Washington
LSC
La Serena
$1,518 Roundtrip, found 1 day ago
$1,518
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Thu, Nov 20 from Washington to La Serena, returning Sat, Nov 29, priced at $1,518 found 1 day ago
LATAM Airlines Group
Sat, Aug 8 - Thu, Aug 20
IAD
Washington
LSC
La Serena
$1,576 Roundtrip, found 1 day ago
$1,576
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Sat, Aug 8 from Washington to La Serena, returning Thu, Aug 20, priced at $1,576 found 1 day ago
LATAM Airlines Group
Sat, Aug 8 - Thu, Aug 20
IAD
Washington
LSC
La Serena
$1,582 Roundtrip, found 1 day ago
$1,582
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Sat, Aug 8 from Washington to La Serena, returning Thu, Aug 20, priced at $1,582 found 1 day ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC) cost?
Lock in a cheap one-way flight from $405 or cheap return flight from $837 from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC)?
The cheapest month to fly from IAD to LSC is November, when there's less demand. Off-peak season is usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IAD to LSC flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC)?
You'll need to take a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from IAD to LSC?
Generally you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC) route, fly before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC) last-minute?
Booking your ticket from IAD to LSC just before your journey is generally more expensive. However, if there's some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book an IAD to LSC flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to LSC flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place will take the hassle out of travel planning. Just pick your flights and select from our extensive range of stays, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to La Florida Airport (LSC)?
Generally, it's possible to cancel or reschedule your IAD to LSC flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
La Florida
Airlines serving
LATAM Airlines Group
Roundtrip price
$836
Distance
4775 mi

Book with confidence

Washington to La Serena Flights

The cheapest times to fly from Washington to La Serena

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to La Serena are during the month of November. You can find some of the cheapest flights from Washington to La Serena with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to La Serena

Sunday is one of the best days to book for cheap flights from Washington to La Serena: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to La Serena

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to La Serena in 2025. You can also book with separate airlines for your outbound and return journeys, from $405 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to La Serena flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to La Serena airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to La Serena Flights

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*Available to One Key members.