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Dulles Intl

$129+ Cheap flights from San Luis Obispo (SBP) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — IAD
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from San Luis Obispo to Dulles Intl

Cheapest flights from San Luis Obispo to Dulles Intl
Explore the most affordable flight options available from San Luis Obispo to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:39 pm
SBP
-
IAD
1 stop23h 02m
Alaska Airlines
Tue 4/286:41 pm
IAD
-
SBP
1 stop7h 38m
Alaska Airlines
Deal found 1/20$257
This Alaska Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:00 am
SBP
-
IAD
1 stop8h 27m
Alaska Airlines
Wed 3/46:20 pm
IAD
-
SBP
1 stop7h 57m
Alaska Airlines
Deal found 1/21$281
This Alaska Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/213:12 pm
SBP
-
IAD
1 stop23h 29m
Alaska Airlines
Wed 4/296:41 pm
IAD
-
SBP
1 stop7h 38m
Alaska Airlines
Deal found 1/21$297
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:19 pm
SBP
-
IAD
1 stop26h 08m
Alaska Airlines
Mon 3/237:11 pm
IAD
-
SBP
2 stops30h 18m
Alaska Airlines
Deal found 1/20$316
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:56 pm
SBP
-
IAD
1 stop8h 30m
United Airlines
Wed 2/183:58 pm
IAD
-
SBP
1 stop8h 11m
United Airlines
Deal found 1/20$329
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:16 pm
SBP
-
IAD
2 stops10h 32m
American Airlines
Sun 2/226:00 am
IAD
-
SBP
1 stop9h 02m
American Airlines
Deal found 1/20$334
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/317:10 pm
SBP
-
IAD
2 stops10h 38m
American Airlines
Tue 4/147:16 am
IAD
-
SBP
2 stops11h 46m
American Airlines
Deal found 1/20$340
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:52 pm
SBP
-
IAD
1 stop9h 20m
United Airlines
Tue 5/126:40 pm
IAD
-
SBP
1 stop8h 35m
United Airlines
Deal found 1/20$345

Find flight deals from San Luis Obispo to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Luis Obispo (SBP) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$257
(Alaska Airlines)

One-way from

$129
(Alaska Airlines)

Popular in

March

Cheapest in

November

Average price

$633
Provider with most accurate pricing for San Luis Obispo County-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for San Luis Obispo County-Washington, D.C. Dulles Intl flights.
Search Deals
From San Luis Obispo County to Washington, D.C. Dulles Intl
Search Deals
One-way flight from San Luis Obispo County to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Luis Obispo to Dulles Intl 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from San Luis Obispo to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

San Luis Obispo

Fly to

Dulles Intl

Route

Depart

Return

Price

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Wed 4/22

3:39 pm-5:41 pm

1 stop23h 02m

Washington, D.C. Dulles Intl

Tue 4/28

6:41 pm-11:19 pm

1 stop7h 38m

$257

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Tue 2/24

6:00 am-5:27 pm

1 stop8h 27m

Washington, D.C. Dulles Intl

Wed 3/4

6:20 pm-11:17 pm

1 stop7h 57m

$281

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Wed 3/11

12:19 pm-5:27 pm

1 stop26h 08m

Washington, D.C. Dulles Intl

Mon 3/23

7:11 pm-10:29 pm

2 stops30h 18m

$316

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Tue 4/21

6:00 am-5:40 am

2 stops20h 40m

Washington, D.C. Dulles Intl

Wed 4/29

6:41 pm-11:19 pm

1 stop7h 38m

$325

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Tue 3/31

2:12 pm-1:25 am

1 stop8h 13m

Washington, D.C. Dulles Intl

Tue 4/14

5:55 pm-11:59 pm

1 stop9h 04m

$329

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Tue 4/21

6:15 am-7:12 pm

1 stop9h 57m

Washington, D.C. Dulles Intl

Sat 5/2

6:40 pm-12:15 am

1 stop8h 35m

$329

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Thu 2/19

5:00 am-4:47 pm

1 stop8h 47m

Washington, D.C. Dulles Intl

Sun 2/22

7:13 pm-11:59 pm

1 stop7h 46m

$329

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Mon 4/13

6:00 am-5:22 pm

1 stop8h 22m

$206

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Wed 5/27

6:00 am-5:42 pm

1 stop8h 42m

$247

San Luis ObispoWashington, D.C.

SBP - IAD

SBPIAD

San Luis Obispo County

Fri 5/29

6:00 am-5:42 pm

1 stop8h 42m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 17 results
1
2
  • Most accurate provider: When it comes to deals on San Luis Obispo-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Luis Obispo-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Luis Obispo-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Luis Obispo-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Luis Obispo-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Luis Obispo to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San Luis Obispo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport?

Currently, October is the cheapest month in which you can book a flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport (average of $208). Flying from San Luis Obispo to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $599). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated January 21, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines and United Airlines from San Luis Obispo to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,775 reviews

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,775 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,191 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

Related info for your journey

Find useful and relevant information for your journey from San Luis Obispo to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Luis Obispo to Washington, D.C. Dulles Intl?

    San Luis Obispo County (SBP), located 3.3 mi from the city center, is the airport you fly out of when you book flights from San Luis Obispo to Washington, D.C. Dulles Intl. 2 airlines have flights from County to Washington, D.C. Dulles Intl on a regular basis. Booking flights from San Luis Obispo County to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.

  • How long is the flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport?

    There are many flights that can get you from San Luis Obispo to Washington, D.C. Dulles Intl Airport in 23h 02m. Fly via Alaska Airlines to get the fastest option. The distance between San Luis Obispo and Washington, D.C. Dulles Intl Airport is about 2370 mi.

  • What are the cheapest airlines flying from San Luis Obispo to Washington, D.C. Dulles Intl Airport round-trip?

    Currently priced at $264, United Airlines will fly you from San Luis Obispo to Washington, D.C. Dulles Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Alaska Airlines for as low as $311. These flights start at 47% lower than the current average price 3 months from now.

  • Can I find deals for flights from San Luis Obispo to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on San Luis Obispo to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Luis Obispo to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Luis Obispo to Dulles Intl.

  • Can I find deals for business class flights from San Luis Obispo to Dulles Intl?

    Yes. Cheapflights offers flight deals from San Luis Obispo to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from San Luis Obispo to Washington, D.C. Dulles Intl Airport (average of $208). Flying from San Luis Obispo to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $599). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Hanover
Herndon
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Luis Obispo to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Oakland to Baltimore flights
Santa Ana to Reagan-National flights
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Santa Ana to Baltimore flights
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Palm Springs to Baltimore flights
Reno to Reagan-National flights
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Long Beach to Baltimore flights
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San Luis Obispo to Baltimore flights
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Medford to Baltimore flights
Medford to Reagan-National flights
Santa Barbara to Baltimore flights

Top 2 airlines flying from San Luis Obispo to Dulles Intl

Discover the top 2 airlines that operate flights from San Luis Obispo to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$264Average$532FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$311Average$492FlexibilityNo cancel feeOn-time75%

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