Vuelos Desde A. Internacional Washington Dulles (IAD) a Humberto Delgado (LIS) Empezando Desde $289

Make sure you check out the Covid-19 Travel Advisor to discover if there are any current quarantine requirements and travel advice reports in effect in Lisbon/Portela Airport when flying from IAD.

If you’re eager to fly directly from Dulles Intl. Airport to Humberto Delgado Airport (LIS), try TAP Air Portugal. This airline will be perfect for you if you prefer to travel from A to B with minimum fuss.

For more info about changing your flight to LIS, please visit our Customer Service Portal.

It’s a good idea to hop up and walk around during your flight from IAD to Humberto Delgado Airport (LIS). You’ll be in the air for 11 hours and 2 minutes, so stretching your muscles will keep you comfortable during this lengthy journey.

With 3,600 mi separating Sterling and Lisbon District, you’ll have ample time to kick back and unwind. Make use of the entertainment on board, finish a crossword or have a snooze.

Hoping to fly nonstop from Sterling to Lisbon District? You’re in luck. TAP Air Portugal offers as many as 30 flights per month and is the number one choice for many well-traveled wanderers.

From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with TAP Air Portugal, Ryanair or EasyJet you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.