$74 Cheap United flights Washington (IAD) to Miami (MIA)

View $74 flight on Tue, Sep 23, 2025Opens in a new window

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$74 Cheap United flights Washington (IAD) to Miami (MIA)

Prices were available within the past 7 days and start at $74 for one-way flights and $135 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Jul 27 - Sat, Aug 2
IAD
Washington
MIA
Miami
$135 Roundtrip, just found
$135
Roundtrip
just found
Select United flight, departing Sun, Jul 27 from Washington to Miami, returning Sat, Aug 2, priced at $135 just found
United
Tue, Sep 23 - Wed, Oct 1
IAD
Washington
MIA
Miami
$147 Roundtrip, found 1 hour ago
$147
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Sep 23 from Washington to Miami, returning Wed, Oct 1, priced at $147 found 1 hour ago
United
Mon, Sep 22 - Tue, Sep 30
IAD
Washington
MIA
Miami
$153 Roundtrip, found 1 hour ago
$153
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Sep 22 from Washington to Miami, returning Tue, Sep 30, priced at $153 found 1 hour ago
United
Fri, Jul 18 - Sat, Jul 26
IAD
Washington
MIA
Miami
$154 Roundtrip, found 1 hour ago
$154
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jul 18 from Washington to Miami, returning Sat, Jul 26, priced at $154 found 1 hour ago
United
Mon, Aug 11 - Tue, Aug 19
IAD
Washington
MIA
Miami
$159 Roundtrip, just found
$159
Roundtrip
just found
Select United flight, departing Mon, Aug 11 from Washington to Miami, returning Tue, Aug 19, priced at $159 just found
United
Mon, Aug 4 - Tue, Aug 12
IAD
Washington
MIA
Miami
$163 Roundtrip, found 1 hour ago
$163
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Aug 4 from Washington to Miami, returning Tue, Aug 12, priced at $163 found 1 hour ago
Flights from Washington (IAD) to Miami (MIA)
Origin airport
Washington Dulles Intl.
Destination airport
Miami Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Popular airline
Frontier Airlines
Distance
923 mi
Average flight time
2 hours 43 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA)?
Make use of the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines return flights from $135 from IAD to MIA. Affordable one-way tickets from $74 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to MIA with United Airlines?
United Airlines flights to Miami tend to be cheaper in the low-season months of September and October. Whether you're in search of a round-trip or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA) with United Airlines?
For cheap United Airlines fares from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA)?
Depart on one of United Airlines's 12 direct weekly flights from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA). To see your options, enter your destination, origin and dates and hit search. Then apply the "Nonstop" and "Airline" filters.
How long does it take to fly from IAD to MIA with United Airlines?
Take off from Washington Dulles Intl. Airport (IAD) for Miami Intl. Airport (MIA) on a nonstop United Airlines flight, and you'll be in the skies for about 2h 58m.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA)?
United Airlines has the most flights from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA) on Thursday. With up to 2 daily departures, you'll get the most options and flexibility on this day.
What is the earliest United Airlines flight from IAD to MIA?
Leaving IAD at 8:45AM UTC-5, the first United Airlines flight to MIA arrives at 11:43AM UTC-5. Traveling early means you're less likely to encounter delays.* Don't like early starts? The last United Airlines flight from IAD to MIA departs at 5:41PM UTC-5 and touches down at 8:39PM UTC-5.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Miami?
Miami Intl. Airport (MIA) is the main arrival point for United Airlines flights from Washington Dulles Intl. Airport (IAD) to Miami. But this carrier also travels to Fort Lauderdale - Hollywood Intl. Airport (FLL). Be sure to choose the "All Airports" option for your destination to see what's available for your journey to Miami.
Why fly with United Airlines from IAD to MIA?
Offering a rewarding loyalty program, United Airlines is a favorite of many passengers heading from IAD to MIA. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA)?
Chances are you'll be flying on a Boeing 737-800 for your United Airlines flight from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA). However, you could be switched to another aircraft if operational demands require it.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Miami Intl. Airport (MIA)?
It's generally possible to change or cancel your flight, although additional charges may apply if you booked over 24 hours ago. Need flexible options? Apply the "No cancel fee" and "Changes included" filters to find flights that won't charge you extra if you have to adjust your plans. To modify your booking, visit "Trips," select your flight and click on "Manage Booking" for more information.

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