DCA vs IAD: Reagan National or Dulles, Which Should You Use?

Pick Reagan National (DCA) for a domestic trip into Washington: it is about 5 miles (8 km) from the US Capitol, the Metro reaches downtown in 17 minutes, and its average fare ran $90 lower in mid-2026.

Pick Dulles (IAD) for anything international, for a long nonstop, or when your trip cannot absorb a delay. Dulles ran 80.7% of its domestic arrivals on time from January to August 2026, against 66.2% at Reagan National, and its cancellation rate was about a third as high.

Below, the two are compared on getting downtown, where you can fly, delays, fares and the airports themselves, as of November 2026. The numbers come from the Metropolitan Washington Airports Authority (MWAA), Metro, the Bureau of Transportation Statistics (BTS), J.D. Power and our own airport database.

Getting downtown

This is where the two airports differ most. The Reagan National taxi sheet puts the US Capitol 5 miles (8 km) away and Union Station 5.5 miles (9 km) away. The Dulles sheet puts Washington, DC, 26 to 30 miles (42 to 48 km) from its terminal.

By Metro, Reagan National is on the Blue and Yellow lines, and an independent guide using WMATA’s published figures lists 17 minutes and $2.85 to Metro Center on a weekday. Two enclosed bridges connect the station to Terminal 2, while Terminal 1 passengers ride an airport shuttle bus to reach it.

Dulles got its own Silver Line station, about a 5-minute walk and 600 feet (183 m) from the terminal. The airport lists $6.75 to Metro Center on a weekday, which is the top of Metro’s fare range. After 9:30 p.m. and on weekends, fares at both airports fall to $2.50 or less.

The ride is the catch. The same guide lists about 53 minutes from Dulles to Metro Center, while the airport itself says 50 to 55 minutes just to Rosslyn, the stop before the river. Plan on about an hour, walk included.

By taxi, the Reagan National sheet shows $18 to the Capitol Hilton and $23 to Union Station, plus a $3 airport fee, so about $21 to $26. The Dulles sheet shows $65 to $73 to DC.

Staying in Northern Virginia changes the math. Tysons is about a tie by taxi, $45 from Reagan National and $47 from Dulles, and the Dulles sheet shows Reston at 8 miles (13 km) and $28.

Edge: Reagan National. It is closer, faster and cheaper to downtown by both Metro and taxi.

Where you can fly

Dulles is the region’s international gateway. MWAA counted 10.53 million international passengers there in 2025, out of 29.01 million in total, with 46 airlines and 164 destinations at the end of that year.

Reagan National barely plays in that market. All but about 300,000 of its 14.4 million passengers from January to July 2026 flew domestically, against 5.9 million international passengers out of 16.3 million at Dulles. Our Reagan National airport page lists five international routes in three countries, with Canada the largest market.

Federal limits explain much of that. Reagan National is held to 60 instrument flights an hour under a slot rule, and to nonstops within 1,250 statute miles under the perimeter rule and its exemptions. Congress has carved out 12 cities beyond the line, including Seattle, Los Angeles, San Francisco and Denver.

The result shows up in our count. Only 6.5% of completed domestic departures from Reagan National flew more than 1,250 miles from January to August 2026, against 32.3% from Dulles, whose flights average about 1,023 miles to Reagan National’s 682.

Inside the US, though, the smaller airport is the busier one. Reagan National flew regular nonstops to 101 domestic airports in that period and Dulles to 68, with 54 served from both.

Your airline often settles it. American and its regional arms PSA and Envoy operated 51% of those Reagan National departures, with Southwest at 11.2% and Delta at 6.8%. At Dulles, United itself operated 64.7%, and of the two, only Dulles has nonstops to Honolulu, Anchorage, Sacramento or Bozeman.

Edge: split. Dulles wins internationally and on long nonstops, and Reagan National wins on domestic choice.

Delays and cancellations

Dulles is the more reliable airport by a wide margin, and that margin has grown. The gap on on-time arrivals was 4.7 points in 2024, 11.6 points in 2025 and 14.5 points in the first eight months of 2026.

The break at Reagan National came in 2025, the year of the January midair collision. The FAA cut the hourly arrival rate from 32 to 26 after the crash and raised it to 30 by the end of February, a local report said in March 2025.

The timing fits, but our count cannot prove the cause, because it cannot separate the arrival cap from weather, staffing or airline scheduling. Reagan National ran below 60% only in July 2026 (58.1%), and its best month that year was April at 75.2%. Dulles ranged from 73.7% to 88.5%.

Airlines coded weather as the cause of about 69% of cancellations at Reagan National and 71% at Dulles. Those weather cancellations still took out 3.5% of scheduled departures at Reagan National, against 1.3% at Dulles.

Once you are on the plane, the wait is about the same: an average taxi-out of 22.8 minutes at Reagan National and 22.3 at Dulles. Congress may yet change the picture. The DCA Air Safety Act, introduced in September 2026, would cap arrivals at 28 an hour and cut 30 slot exemptions. It was still a proposal when we checked, with no report of committee action.

Edge: Dulles. It has been ahead on punctuality in every period we counted, and its cancellation rate in 2026 is about a third of Reagan National’s.

Airfares

BTS put the average domestic fare at $435.42 from Reagan National and $525.87 from Dulles in the second quarter of 2026, a gap of $90.45. The national average was $445.26, so Reagan National sits just under it and Dulles well over.

That is not like for like. The average domestic flight from Dulles is about 1.5 times as long, so some of the gap is simply distance, and on a specific route the cheaper airport can flip.

Compare the actual tickets, then add the ground cost from the callout above. A Dulles fare that looks $50 cheaper still loses if you would take a taxi both ways, though it wins by Metro, at the cost of more than an hour. Our JFK vs LaGuardia comparison runs the same sums for New York.

Edge: Reagan National. Its average fare is lower, although longer routes account for part of the difference.

The airports themselves

Travelers rate Reagan National slightly higher. J.D. Power’s 2026 study of large airports scored it 637, in 18th place, with Dulles at 621 in 21st. Neither is close to Tampa, the leader at 715.

Dulles has more room and more to fix. Its longest runway is about 11,500 feet (3,500 m), according to our Dulles airport page, against about 7,200 feet (2,190 m) at Reagan National, a length our database says rules out 108 aircraft types there.

Its best-known oddity is the mobile lounges that shuttle passengers around the airfield. A $22.5 billion plan announced in July 2026 would end them. Transportation Secretary Sean Duffy said construction could start next spring, and President Trump said Congress would need to approve some parts.

Nearer term, Dulles is adding Concourse E, a $700 million building with 14 United gates and a 40,000-square-foot club. MWAA told its board in September that the opening had moved to October 2026, but we found no report of it opening as of November 2.

Parking leans the other way: drive-up economy parking is $20 a day at Dulles and $25 at Reagan National, and both lots have shuttles to the terminals. Dulles says reserving ahead usually gets the lowest rate.

Edge: Reagan National. Its satisfaction score is higher, although Dulles has the cheaper parking and the bigger building program.

Who should pick which