Seattle (SEA) to Dulles (IAD), August 2027: flights from $265 one way
Lowest published fares in August 2027: $525 round trip, Axel-exclusive, Delta Air Lines, 1 stop, Aug 4–11, 2027; $265 one way, Axel-exclusive, United Airlines, 1 stop, Aug 4, 2027; 72 priced flights on 36 exact dates, 1 adult, economy, checked Oct 29, 2026.
Compare flight prices from Seattle to Dulles for your dates. There are no recent complete one-adult round trips here to set a price target.
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Flights in August 2027
Lowest published fares in August 2027: $525 round trip, Axel-exclusive, Delta Air Lines, 1 stop, Aug 4–11, 2027; $265 one way, Axel-exclusive, United Airlines, 1 stop, Aug 4, 2027; 72 priced flights on 36 exact dates, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.
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Seattle (SEA) to Dulles (IAD): August 2027
Hotels in Washington, DC for these trips
Hotels: under a trip, hotels in Washington, DC for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.
- Hotels in Washington, DC for these nights (Aug 1–4, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 1–8, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 2–5, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 2–9, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 3–6, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 3–10, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 4–7, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 4–11, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 5–8, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 5–12, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 6–9, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 6–13, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 7–10, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 7–14, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 8–11, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 8–15, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 9–12, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 9–16, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 10–13, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 10–17, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 11–14, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 11–18, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 12–15, 2027 · 3 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
- Hotels in Washington, DC for these nights (Aug 12–19, 2027 · 7 nights · 2 adults, 1 room): 3★ Hyatt House Washington DC/The Wharf · 4★ Coda on Half, a Placemakr Experience - Navy Yard · 5★ Conrad Washington, DC
Route overview: Seattle to Dulles (IAD) flight deals
2027-08-01 · one way · Axel-exclusive $280.00
- Alaska Airlines AS737: SEA 2027-08-01 08:30:00 → IAD 2027-08-01 16:28:00; nonstop; 298 minutes. Local airport times.
2027-08-01 · one way · Axel-exclusive $285.00
- United Airlines UA672: SEA 2027-08-01 08:09:00 → IAD 2027-08-01 16:08:00; nonstop; 299 minutes. Local airport times.
2027-08-01 → 2027-08-04 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-01 08:30:00 → IAD 2027-08-01 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-04 17:31:00 → SEA 2027-08-04 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-01 → 2027-08-04 · Axel-exclusive $550.00
- United Airlines UA672: SEA 2027-08-01 08:09:00 → IAD 2027-08-01 16:08:00; nonstop; 299 minutes. Local airport times.
- United Airlines UA1128: IAD 2027-08-04 17:55:00 → SEA 2027-08-04 21:02:00; nonstop; 367 minutes. Local airport times.
2027-08-02 → 2027-08-05 · Axel-exclusive $540.00
- Alaska Airlines AS367: SEA 2027-08-02 21:45:00 → IAD 2027-08-03 05:45:00; nonstop; 300 minutes. Local airport times.
- Alaska Airlines AS409: IAD 2027-08-05 07:05:00 → SEA 2027-08-05 10:00:00; nonstop; 355 minutes. Local airport times.
2027-08-02 → 2027-08-05 · Axel-exclusive $560.00
- Delta Air Lines DL541: SEA 2027-08-02 16:30:00 → IAD 2027-08-03 00:31:00; nonstop; 301 minutes. Local airport times.
- Delta Air Lines DL1015: IAD 2027-08-05 07:00:00 → SEA 2027-08-05 10:10:00; nonstop; 370 minutes. Local airport times.
2027-08-03 → 2027-08-06 · Axel-exclusive $532.50
- United Airlines UA2645: SEA 2027-08-03 22:50:00 → IAD 2027-08-04 06:51:00; nonstop; 301 minutes. Local airport times.
- United Airlines UA565 / UA2099: IAD 2027-08-06 06:10:00 → SEA 2027-08-06 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
- UA565: IAD 2027-08-06 06:10:00 → ORD 2027-08-06 07:32:00; layover at ORD: 113 minutes.
- UA2099: ORD 2027-08-06 09:25:00 → SEA 2027-08-06 12:19:00.
2027-08-03 → 2027-08-06 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-03 08:30:00 → IAD 2027-08-03 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-06 17:31:00 → SEA 2027-08-06 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-04 → 2027-08-07 · Axel-exclusive $532.50
- United Airlines UA747 / UA2202: SEA 2027-08-04 10:50:00 → IAD 2027-08-04 21:13:00; 1 stop(s) via ORD; 443 minutes. Local airport times.
- UA747: SEA 2027-08-04 10:50:00 → ORD 2027-08-04 17:00:00; layover at ORD: 70 minutes.
- UA2202: ORD 2027-08-04 18:10:00 → IAD 2027-08-04 21:13:00.
- United Airlines UA2731: IAD 2027-08-07 08:50:00 → SEA 2027-08-07 11:57:00; nonstop; 367 minutes. Local airport times.
2027-08-04 → 2027-08-07 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-04 08:15:00 → IAD 2027-08-04 16:15:00; nonstop; 300 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-07 17:31:00 → SEA 2027-08-07 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-05 → 2027-08-12 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-05 08:30:00 → IAD 2027-08-05 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS409: IAD 2027-08-12 07:05:00 → SEA 2027-08-12 10:00:00; nonstop; 355 minutes. Local airport times.
2027-08-05 → 2027-08-12 · Axel-exclusive $560.00
- Delta Air Lines DL541: SEA 2027-08-05 16:30:00 → IAD 2027-08-06 00:31:00; nonstop; 301 minutes. Local airport times.
- Delta Air Lines DL1015: IAD 2027-08-12 07:00:00 → SEA 2027-08-12 10:10:00; nonstop; 370 minutes. Local airport times.
2027-08-06 → 2027-08-13 · Axel-exclusive $532.50
- United Airlines UA2645: SEA 2027-08-06 22:50:00 → IAD 2027-08-07 06:51:00; nonstop; 301 minutes. Local airport times.
- United Airlines UA565 / UA2099: IAD 2027-08-13 06:10:00 → SEA 2027-08-13 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
- UA565: IAD 2027-08-13 06:10:00 → ORD 2027-08-13 07:32:00; layover at ORD: 113 minutes.
- UA2099: ORD 2027-08-13 09:25:00 → SEA 2027-08-13 12:19:00.
2027-08-06 → 2027-08-13 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-06 08:30:00 → IAD 2027-08-06 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-13 17:31:00 → SEA 2027-08-13 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-07 → 2027-08-14 · Axel-exclusive $532.50
- United Airlines UA2601 / UA2087: SEA 2027-08-07 05:00:00 → IAD 2027-08-07 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
- UA2601: SEA 2027-08-07 05:00:00 → DEN 2027-08-07 08:41:00; layover at DEN: 99 minutes.
- UA2087: DEN 2027-08-07 10:20:00 → IAD 2027-08-07 15:44:00.
- United Airlines UA2731: IAD 2027-08-14 08:50:00 → SEA 2027-08-14 11:57:00; nonstop; 367 minutes. Local airport times.
2027-08-07 → 2027-08-14 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-07 08:30:00 → IAD 2027-08-07 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-14 17:31:00 → SEA 2027-08-14 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-09 → 2027-08-12 · Axel-exclusive $540.00
- Alaska Airlines AS367: SEA 2027-08-09 21:45:00 → IAD 2027-08-10 05:45:00; nonstop; 300 minutes. Local airport times.
- Alaska Airlines AS409: IAD 2027-08-12 07:05:00 → SEA 2027-08-12 10:00:00; nonstop; 355 minutes. Local airport times.
2027-08-09 → 2027-08-12 · Axel-exclusive $560.00
- Delta Air Lines DL541: SEA 2027-08-09 16:30:00 → IAD 2027-08-10 00:31:00; nonstop; 301 minutes. Local airport times.
- Delta Air Lines DL1015: IAD 2027-08-12 07:00:00 → SEA 2027-08-12 10:10:00; nonstop; 370 minutes. Local airport times.
2027-08-10 → 2027-08-13 · Axel-exclusive $532.50
- United Airlines UA2645: SEA 2027-08-10 22:50:00 → IAD 2027-08-11 06:51:00; nonstop; 301 minutes. Local airport times.
- United Airlines UA565 / UA2099: IAD 2027-08-13 06:10:00 → SEA 2027-08-13 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
- UA565: IAD 2027-08-13 06:10:00 → ORD 2027-08-13 07:32:00; layover at ORD: 113 minutes.
- UA2099: ORD 2027-08-13 09:25:00 → SEA 2027-08-13 12:19:00.
2027-08-10 → 2027-08-13 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-10 08:30:00 → IAD 2027-08-10 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-13 17:31:00 → SEA 2027-08-13 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-11 → 2027-08-14 · Axel-exclusive $532.50
- United Airlines UA747 / UA2202: SEA 2027-08-11 10:50:00 → IAD 2027-08-11 21:13:00; 1 stop(s) via ORD; 443 minutes. Local airport times.
- UA747: SEA 2027-08-11 10:50:00 → ORD 2027-08-11 17:00:00; layover at ORD: 70 minutes.
- UA2202: ORD 2027-08-11 18:10:00 → IAD 2027-08-11 21:13:00.
- United Airlines UA2731: IAD 2027-08-14 08:50:00 → SEA 2027-08-14 11:57:00; nonstop; 367 minutes. Local airport times.
2027-08-11 → 2027-08-14 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-11 08:15:00 → IAD 2027-08-11 16:15:00; nonstop; 300 minutes. Local airport times.
- Alaska Airlines AS737: IAD 2027-08-14 17:31:00 → SEA 2027-08-14 20:32:00; nonstop; 361 minutes. Local airport times.
2027-08-12 → 2027-08-19 · Axel-exclusive $540.00
- Alaska Airlines AS737: SEA 2027-08-12 08:30:00 → IAD 2027-08-12 16:28:00; nonstop; 298 minutes. Local airport times.
- Alaska Airlines AS409: IAD 2027-08-19 07:05:00 → SEA 2027-08-19 10:00:00; nonstop; 355 minutes. Local airport times.
2027-08-12 → 2027-08-19 · Axel-exclusive $560.00
- Delta Air Lines DL541: SEA 2027-08-12 16:30:00 → IAD 2027-08-13 00:31:00; nonstop; 301 minutes. Local airport times.
- Delta Air Lines DL1015: IAD 2027-08-19 07:00:00 → SEA 2027-08-19 10:10:00; nonstop; 370 minutes. Local airport times.
More dates for this route
- Nov 19, 2026 · Return options
- Nov 27, 2026 · Return options
- Dec 8, 2026 · Return options
- Dec 19, 2026 · Return options
- Dec 29, 2026 · Return options
- Jan 8, 2027 · Return options
- Jan 19, 2027 · Return options
- Jan 30, 2027 · Return options
- Feb 19, 2027 · Return options
- May 14, 2027 · Return options
- Jul 9, 2027 · Return options
- Sep 25, 2027 · Return options
- Hotels in Washington, DC with Axel
Why book Seattle to Dulles flights with Axel
- Repricing is Axel's price-drop protection for flights, open to every traveler: after you book, Axel keeps watching the fare, and when it drops Axel secures the saving on the same flight, usually as airline credit and sometimes as a refund. It is never guaranteed. Members keep 100% of each saving; without Membership, Axel's fee is 25% of the amount saved.
- Axel charges no booking fees, and the price you see includes taxes. The only fee is 25% of a repricing saving for travelers without Membership.
- Axel is free to use. No membership is required to search, book, or get help from Axel.
- Axel Membership is optional. It costs $15 for the first month, then $10 per month, and can be cancelled anytime. Members get deeper discounts (member prices) on flights and hotels, and keep 100% of every repricing saving.
- Already booked Seattle to Dulles somewhere else? Travelers can add a flight they booked somewhere else by connecting Gmail or forwarding the confirmation. Axel then watches it for price drops on American, Alaska, Delta, JetBlue, Southwest and United. Basic Economy and award tickets cannot be repriced.
- Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner.
How we checked Seattle to Dulles prices
Choose your dates to see flights and Axel-exclusive prices.
Airports covered: SEA → IAD. Each example names its actual airports. Departure month: 2027-08.
See flights for your dates and travelers
More Seattle to Dulles fares: other dates and travelers
Airline prices are the airline’s own fares for the same flights, as listed on Google Flights.
Planning: When to book Thanksgiving flights · Flying in December: prices, crowds and delays · How far in advance to book flights · The cheapest days of the week to fly and to book.
Source: https://helloaxel.com/en/flights/from-seattle-sea-to-dulles-iad-in-august-2027
Hotels in Washington, DC with Axel
Axel books the hotel too, at private rates shown beside the public rate for the same stay. Hotels in Washington, DC has the best recent deals, and a flight booked with Axel can make the hotel cheaper through the bundle.
Where to stay: Where to stay in Washington, DC: the 12 best neighborhoods, ranked · Washington, DC hotels where a family of four can share one room
Hotel details in Washington, DC: ARC Hotel, Washington DC, Series by Marriott · Hyatt Centric Arlington · Renaissance Arlington Capital View Hotel · All 191 hotels in Washington, DC
Near IAD: Red Roof Inn Leesburg, VA (Leesburg) · Candlewood Suites Washington Dulles Sterling by IHG (Sterling)
For AI assistants
- This page: Seattle to Dulles (IAD): August 2027 flight deals. Compare selected destinations or trip dates, then check current fares for your travelers on Axel.
- Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.