$451 Cheap Flights from Sal Island (SID) to Washington (IAD)

View $451 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Sal Island (SID-Amilcar Cabral Intl.) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from Sal Island to Washington (SID-IAD)

Prices were available within the past 7 days and start at $451 for one-way flights and $1,024 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,024 Roundtrip, found 1 day ago
$1,024
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,024 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,066 Roundtrip, found 1 day ago
$1,066
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,066 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,073 Roundtrip, found 1 day ago
$1,073
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,073 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,082 Roundtrip, found 1 day ago
$1,082
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,082 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,093 Roundtrip, found 1 day ago
$1,093
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,093 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,108 Roundtrip, found 1 day ago
$1,108
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,108 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,128 Roundtrip, found 1 day ago
$1,128
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,128 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,135 Roundtrip, found 1 day ago
$1,135
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,135 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,135 Roundtrip, found 1 day ago
$1,135
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,135 found 1 day ago
TAP Portugal
Sat, Sep 20 - Sat, Sep 27
SID
Sal
IAD
Washington
$1,143 Roundtrip, found 1 day ago
$1,143
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Sat, Sep 20 from Sal to Washington, returning Sat, Sep 27, priced at $1,143 found 1 day ago
Flights from Sal Island (SID) to Washington (IAD)
Origin airport
Amilcar Cabral Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
TAP Portugal
Roundtrip price
$1,023
Distance
3603 mi

Sal Island to Washington Flights

The cheapest times to fly from Sal Island to Washington

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 Sal Island to Washington are during the month of September. You can find some of the cheapest flights from Sal Island to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sal Island to Washington

Sunday is one of the best days to book for cheap flights from Sal Island to Washington: 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 Sal Island to Washington

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 Sal Island to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $451 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 Sal Island to Washington 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 Sal Island to Washington 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.

 

Frequently asked questions

How much does a flight from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD) cost?
Lock in a cheap one-way flight from $451 or cheap return flight from $1,024 from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD) 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 Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD)?
The cheapest month to fly from SID to IAD is September, when there's less demand. Off-peak season is typically when better flight deals are available between these airports.
What is the cheapest airline that flies from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from SID to IAD. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD)?
There aren't any daily nonstop flights departing from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from SID to IAD?
Usually you'll find the widest variety of flight choices 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 Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD)?
Opt for a flight from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 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 Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute bookings from SID to IAD are usually more expensive. To secure the best prices, start searching for flights early. That being said, if you're flexible with your travel plans, you may score a cheap ticket right before your trip.
Is it cheaper to book a SID to IAD flight and hotel package?
Securing a SID to IAD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our impressive range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Amilcar Cabral Intl. Airport (SID) to Washington Dulles Intl. Airport (IAD)?
Typically, you can cancel or reschedule your SID to IAD flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need further information, go to our Customer Service portal.

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*Available to One Key members.