Latest deals
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to São Tomé from $1,617

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to São Tomé departing on 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to São Tomé

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
5:25 pm - 6:15 pm
IAD
-
TMS
19h 50m
2 stops
TAP AIR PORTUGAL Logo
8:00 pm - 3:15 pm
TMS
-
IAD
24h 15m
2 stops
$1,617TAP AIR PORTUGAL
Thu, Dec 3 - Sun, Dec 6
TAP AIR PORTUGAL Logo
5:05 pm - 5:45 pm
IAD
-
TMS
20h 40m
2 stops
TAP AIR PORTUGAL Logo
9:35 pm - 8:35 pm
TMS
-
IAD
27h 00m
1 stop
$1,743TAP AIR PORTUGAL
Sat, Oct 10 - Sat, Oct 17
Multiple Airlines Logo
10:55 am - 5:40 pm
IAD
-
TMS
26h 45m
2 stops
Multiple Airlines Logo
7:00 am - 8:55 am
TMS
-
IAD
29h 55m
3 stops
$1,907Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
TAP AIR PORTUGAL Logo
5:25 pm - 5:30 pm
IAD
-
TMS
43h 05m
1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:15 pm
TMS
-
IAD
24h 15m
2 stops
$1,957TAP AIR PORTUGAL
Thu, Dec 3 - Sun, Dec 6
TAP AIR PORTUGAL Logo
8:15 am - 6:15 pm
IAD
-
TMS
29h 00m
3 stops
TAP AIR PORTUGAL Logo
8:00 pm - 3:15 pm
TMS
-
IAD
24h 15m
2 stops
$1,963TAP AIR PORTUGAL
Thu, Dec 3 - Sun, Dec 6
Multiple Airlines Logo
10:55 am - 5:40 pm
IAD
-
TMS
26h 45m
3 stops
Multiple Airlines Logo
7:00 am - 8:55 am
TMS
-
IAD
29h 55m
3 stops
$1,969Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
TAP AIR PORTUGAL Logo
8:15 am - 5:30 pm
IAD
-
TMS
52h 15m
2 stops
TAP AIR PORTUGAL Logo
8:00 pm - 3:15 pm
TMS
-
IAD
24h 15m
2 stops
$1,983TAP AIR PORTUGAL
Thu, Dec 3 - Sun, Dec 6
Multiple Airlines Logo
10:55 am - 4:45 pm
IAD
-
TMS
25h 50m
2 stops
Multiple Airlines Logo
7:00 am - 7:30 pm
TMS
-
IAD
16h 30m
2 stops
$2,003Multiple Airlines
Sat, Oct 10 - Sat, Oct 17
Multiple Airlines Logo
10:55 am - 4:45 pm
IAD
-
TMS
25h 50m
2 stops
Multiple Airlines Logo
7:00 am - 8:55 am
TMS
-
IAD
29h 55m
3 stops
$2,055Multiple Airlines
Sat, Oct 10 - Sat, Oct 17
TAP AIR PORTUGAL Logo
8:15 am - 6:15 pm
IAD
-
TMS
29h 00m
3 stops
TAP AIR PORTUGAL Logo
8:00 pm - 11:00 pm
TMS
-
IAD
32h 00m
3 stops
$2,289TAP AIR PORTUGAL
Thu, Dec 3 - Sun, Dec 6

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Ethiopian Air flights from Washington, D.C. Dulles Intl Airport to São Tomé

Our best Ethiopian Air deals on Washington, D.C. Dulles Intl Airport to São Tomé flight tickets
Ethiopian Air
Aug 6
IAD10:55 amWashington, D.C. Dulles Intl
26h 45m
2 stops
TMS5:40 pmSao Tome Is
Aug 13
TMS7:00 amSao Tome Is
29h 55m
4 stops
IAD8:55 amWashington, D.C. Dulles Intl
$2,335
Ethiopian Air
Aug 6
IAD10:55 amWashington, D.C. Dulles Intl
26h 45m
3 stops
TMS5:40 pmSao Tome Is
Aug 13
TMS7:00 amSao Tome Is
29h 55m
4 stops
IAD8:55 amWashington, D.C. Dulles Intl
$2,593

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to São Tomé

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to São Tomé flight tickets
TAP AIR PORTUGAL
Dec 3
IAD5:25 pmWashington, D.C. Dulles Intl
19h 50m
2 stops
TMS6:15 pmSao Tome Is
Dec 6
TMS8:00 pmSao Tome Is
24h 15m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
$1,617
TAP AIR PORTUGAL
Oct 10
IAD5:05 pmWashington, D.C. Dulles Intl
20h 40m
2 stops
TMS5:45 pmSao Tome Is
Oct 17
TMS9:35 pmSao Tome Is
27h 00m
1 stop
IAD8:35 pmWashington, D.C. Dulles Intl
$1,743
TAP AIR PORTUGAL
Dec 3
IAD5:25 pmWashington, D.C. Dulles Intl
43h 05m
1 stop
TMS5:30 pmSao Tome Is
Dec 6
TMS8:00 pmSao Tome Is
24h 15m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
$1,957

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to São Tomé that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 15, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to São Tomé that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 12/3

5:25 pm-6:15 pm

2 stops19h 50m

Sao Tome Is

Sun 12/6

8:00 pm-3:15 pm

2 stops24h 15m

$1,617

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Sat 10/10

5:05 pm-5:45 pm

2 stops20h 40m

Sao Tome Is

Sat 10/17

9:35 pm-8:35 pm

1 stop27h 00m

$1,743

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Tue 9/1

10:55 am-5:40 pm

2 stops26h 45m

Sao Tome Is

Tue 9/8

7:00 am-8:55 am

3 stops29h 55m

$1,907

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 12/3

5:25 pm-5:30 pm

1 stop43h 05m

Sao Tome Is

Sun 12/6

8:00 pm-3:15 pm

2 stops24h 15m

$1,957

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 12/3

8:15 am-6:15 pm

3 stops29h 00m

Sao Tome Is

Sun 12/6

8:00 pm-3:15 pm

2 stops24h 15m

$1,963

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Tue 9/1

10:55 am-5:40 pm

3 stops26h 45m

Sao Tome Is

Tue 9/8

7:00 am-8:55 am

3 stops29h 55m

$1,969

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 12/3

8:15 am-5:30 pm

2 stops52h 15m

Sao Tome Is

Sun 12/6

8:00 pm-3:15 pm

2 stops24h 15m

$1,983
Quickest round-trip

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Sat 10/10

10:55 am-4:45 pm

2 stops25h 50m

Sao Tome Is

Sat 10/17

7:00 am-7:30 pm

2 stops16h 30m

$2,003

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Sat 10/10

10:55 am-4:45 pm

2 stops25h 50m

Sao Tome Is

Sat 10/17

7:00 am-8:55 am

3 stops29h 55m

$2,055

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 12/3

8:15 am-6:15 pm

3 stops29h 00m

Sao Tome Is

Sun 12/6

8:00 pm-11:00 pm

3 stops32h 00m

$2,289

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Washington, D.C. Dulles Intl Airport to São Tomé

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to São Tomé according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to São Tomé (IAD to TMS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to São Tomé

Fastest flight time

19h 50m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to São Tomé takes 19h 50m
There are no direct flights from Washington, D.C. Dulles Intl Airport to São Tomé. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to São Tomé.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to São Tomé

  • How far is Washington, D.C. Dulles Intl to Sao Tome Is by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to Sao Tome Is is 5886.9 mi. Typically, this will take 19h 50m by plane in normal conditions.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport are updated daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport.

  • What documentation or ID do you need to fly to Sao Tome Is Airport?

    The required travel and health documents for your Sao Tome Is Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sao Tome Is Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to São Tomé

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to São Tomé?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from São Tomé. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to São Tomé with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to São Tomé?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to São Tomé. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to São Tomé with flexible booking policies on momondo?

Yes. All flights to São Tomé from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to São Tomé?

momondo helps you find the best flight between Washington, D.C. and São Tomé by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to São Tomé right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to São Tomé now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to São Tomé and let you know when they change.

An easier way to manage your São Tomé trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 8/14
Fri 8/21
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to São Tomé and Príncipe