$839 Cheap Flights from Baltimore (BWI) to Perth (PER)

View $839 flight on Fri, Sep 5, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Perth Airport (PER)

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Cheap Flights from Baltimore to Perth (BWI-PER)

Prices were available within the past 7 days and start at $839 for one-way flights and $1,522 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Oct 20 - Mon, Oct 27
BWI
Baltimore
PER
Perth
$1,522 Roundtrip, found 2 days ago
$1,522
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Oct 20 from Baltimore to Perth, returning Mon, Oct 27, priced at $1,522 found 2 days ago
Alaska Airlines
Mon, Oct 20 - Mon, Oct 27
BWI
Baltimore
PER
Perth
$1,535 Roundtrip, found 2 days ago
$1,535
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Oct 20 from Baltimore to Perth, returning Mon, Oct 27, priced at $1,535 found 2 days ago
Qantas Airways
Sun, Feb 1 - Sun, Feb 15
BWI
Baltimore
PER
Perth
$1,553 Roundtrip, found 3 days ago
$1,553
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Sun, Feb 1 from Baltimore to Perth, returning Sun, Feb 15, priced at $1,553 found 3 days ago
Qantas Airways
Sun, Feb 1 - Tue, Feb 10
BWI
Baltimore
PER
Perth
$1,566 Roundtrip, found 3 days ago
$1,566
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Sun, Feb 1 from Baltimore to Perth, returning Tue, Feb 10, priced at $1,566 found 3 days ago
Air New Zealand
Sun, Sep 21 - Sun, Sep 28
BWI
Baltimore
PER
Perth
$1,581 Roundtrip, found 23 hours ago
$1,581
Roundtrip
found 23 hours ago
Select Air New Zealand flight, departing Sun, Sep 21 from Baltimore to Perth, returning Sun, Sep 28, priced at $1,581 found 23 hours ago
Alaska Airlines
Fri, Oct 24 - Thu, Oct 30
BWI
Baltimore
PER
Perth
$1,586 Roundtrip, found 1 day ago
$1,586
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Oct 24 from Baltimore to Perth, returning Thu, Oct 30, priced at $1,586 found 1 day ago
Qantas Airways
Sun, Sep 14 - Sun, Sep 28
BWI
Baltimore
PER
Perth
$1,595 Roundtrip, found 6 days ago
$1,595
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Sun, Sep 14 from Baltimore to Perth, returning Sun, Sep 28, priced at $1,595 found 6 days ago
Qantas Airways
Sun, Sep 7 - Sun, Sep 21
BWI
Baltimore
PER
Perth
$1,597 Roundtrip, found 3 days ago
$1,597
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Sun, Sep 7 from Baltimore to Perth, returning Sun, Sep 21, priced at $1,597 found 3 days ago
American Airlines
Thu, Nov 27 - Wed, Dec 17
BWI
Baltimore
PER
Perth
$1,614 Roundtrip, found 3 days ago
$1,614
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Nov 27 from Baltimore to Perth, returning Wed, Dec 17, priced at $1,614 found 3 days ago
Singapore Airlines
Sun, Feb 8 - Thu, Feb 26
BWI
Baltimore
PER
Perth
$1,648 Roundtrip, found 6 days ago
$1,648
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Sun, Feb 8 from Baltimore to Perth, returning Thu, Feb 26, priced at $1,648 found 6 days ago

Alternative airports near Perth

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Perth Airport PER. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $2,016
PER
Perth Airport
CheapestClosest
Average driving time to city center14 min
Flights from $2,016
Flights from Baltimore (BWI) to Perth (PER)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Perth
Airlines serving
Air New Zealand, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Qantas Airways, Qatar Airways, Singapore Airlines, United
Roundtrip price
$1,522
Distance
11568 mi

Baltimore to Perth Flights

The cheapest times to fly from Baltimore to Perth

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 Baltimore to Perth are during the month of October. You can find some of the cheapest flights from Baltimore to Perth with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Perth

Sunday is one of the best days to book for cheap flights from Baltimore to Perth: 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 Baltimore to Perth

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 Baltimore to Perth in 2025. You can also book with separate airlines for your outbound and return journeys, from $839 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 Baltimore to Perth 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 Baltimore to Perth 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.

 

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER) cost?
Discover the latest flight deals from BWI to PER by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from BWI to PER?
The cheapest flights from BWI to PER are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from BWI to PER?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BWI to PER. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER)?
Direct flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BWI to PER?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the time of year, airline 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER)?
Choose a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER) that leaves before 3 PM to reduce the likelihood of delays. Departures after this hour are on average 22% more likely to be canceled.**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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER) last-minute?
Last-minute bookings from BWI to PER are usually more expensive. To lock in the cheapest rates, start looking for flights ahead of time. That being said, if your travel plans are flexible, it's possible to land a cheap ticket right before you leave.
Is it cheaper to book a BWI to PER flight and hotel package?
Securing a BWI to PER flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our extensive range of accommodations and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Perth Airport (PER)?
If you booked your BWI to PER flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you purchased, 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 for more information.

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*Available to One Key members.