$1,291 Cheap Flights from Washington (DCA) to Mount Isa (ISA)

View $1,291 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Mount Isa, QLD (ISA)

Cheap Flights from Washington to Mount Isa (DCA-ISA)

Prices were available within the past 7 days and start at $1,291 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA) cost?
Secure a cheap one-way flight from $1,291 or cheap return flight from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA)?
Planning your trip for is a great way to save, as it's the cheapest month for flights between DCA and ISA. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DCA to ISA flight.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA)?
There are no daily direct flights from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from DCA to ISA?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA)?
To land at Mount Isa Airport (ISA) without delays, pick a flight that leaves from Ronald Reagan Washington National Airport (DCA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA) last-minute?
Booking your ticket from DCA to ISA right before your trip is generally more expensive. But if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a DCA to ISA flight and hotel package?
Compared with arranging hotels and flights separately, booking a DCA to ISA flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place will take the stress out of planning your trip. Simply pick your flights and choose from our wide range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Mount Isa Airport (ISA)?
If you reserved your DCA to ISA flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Mount Isa
Distance
9934 mi

Book with confidence

Book with confidence

Washington to Mount Isa Flights

The cheapest times to fly from Washington to Mount Isa

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Mount Isa are during the month of . You can find some of the cheapest flights from Washington to Mount Isa with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Mount Isa

Sunday is one of the best days to book for cheap flights from Washington to Mount Isa: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Mount Isa

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Mount Isa in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,291 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Mount Isa flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Mount Isa airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Mount Isa Flights

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*Available to One Key members.