$169 Cheap Flights from Philadelphia (PHL) to Rapid City (RAP)

View $169 flight on Fri, Aug 22, 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Philadelphia to Rapid City (PHL-RAP)

Prices were available within the past 7 days and start at $169 for one-way flights and $269 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Sep 13 - Wed, Sep 17
PHL
Philadelphia
RAP
Rapid City
$269 Roundtrip, found 4 hours ago
$269
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Sep 13 from Philadelphia to Rapid City, returning Wed, Sep 17, priced at $269 found 4 hours ago
American Airlines
Sun, Sep 21 - Sat, Sep 27
PHL
Philadelphia
RAP
Rapid City
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Sep 21 from Philadelphia to Rapid City, returning Sat, Sep 27, priced at $269 found 1 day ago
Delta
Fri, Oct 24 - Thu, Nov 6
PHL
Philadelphia
RAP
Rapid City
$274 Roundtrip, found 5 hours ago
$274
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Oct 24 from Philadelphia to Rapid City, returning Thu, Nov 6, priced at $274 found 5 hours ago
Delta
Thu, Oct 23 - Tue, Nov 11
PHL
Philadelphia
RAP
Rapid City
$279 Roundtrip, found 3 days ago
$279
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Oct 23 from Philadelphia to Rapid City, returning Tue, Nov 11, priced at $279 found 3 days ago
United
Tue, Sep 23 - Tue, Sep 30
PHL
Philadelphia
RAP
Rapid City
$287 Roundtrip, found 2 days ago
$287
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 23 from Philadelphia to Rapid City, returning Tue, Sep 30, priced at $287 found 2 days ago
United
Tue, Sep 23 - Tue, Sep 30
PHL
Philadelphia
RAP
Rapid City
$291 Roundtrip, found 2 days ago
$291
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 23 from Philadelphia to Rapid City, returning Tue, Sep 30, priced at $291 found 2 days ago
Delta
Mon, Oct 20 - Sat, Oct 25
PHL
Philadelphia
RAP
Rapid City
$294 Roundtrip, found 5 hours ago
$294
Roundtrip
found 5 hours ago
Select Delta flight, departing Mon, Oct 20 from Philadelphia to Rapid City, returning Sat, Oct 25, priced at $294 found 5 hours ago
Delta
Mon, Oct 20 - Thu, Nov 6
PHL
Philadelphia
RAP
Rapid City
$299 Roundtrip, found 5 hours ago
$299
Roundtrip
found 5 hours ago
Select Delta flight, departing Mon, Oct 20 from Philadelphia to Rapid City, returning Thu, Nov 6, priced at $299 found 5 hours ago
United
Tue, Sep 2 - Tue, Sep 30
PHL
Philadelphia
RAP
Rapid City
$302 Roundtrip, found 3 hours ago
$302
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 2 from Philadelphia to Rapid City, returning Tue, Sep 30, priced at $302 found 3 hours ago
Delta
Fri, Oct 31 - Thu, Nov 6
PHL
Philadelphia
RAP
Rapid City
$304 Roundtrip, found 3 days ago
$304
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 31 from Philadelphia to Rapid City, returning Thu, Nov 6, priced at $304 found 3 days ago

Find the cheapest month to fly from Philadelphia (PHL) to Rapid City (RAP)

July is typically the cheapest month to fly

From $268 - $598 per traveler.

Graph displaying average flight prices per month

Alternative airports near Rapid City

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

Select flight to Rapid City Regional RAP. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $420
RAP
Rapid City Regional
CheapestClosest
Average driving time to city center16 min
Flights from $420
Flights from Philadelphia (PHL) to Rapid City (RAP)
Origin airport
Philadelphia Intl.
Destination airport
Rapid City Regional
Airlines serving
American Airlines, Delta, United
Roundtrip price
$268
Distance
1450 mi

Philadelphia to Rapid City Flights

The cheapest times to fly from Philadelphia to Rapid City

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 Philadelphia to Rapid City are during the month of September. You can find some of the cheapest flights from Philadelphia to Rapid City with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Rapid City

Sunday is one of the best days to book for cheap flights from Philadelphia to Rapid City: 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 Philadelphia to Rapid City

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 Philadelphia to Rapid City in 2025. You can also book with separate airlines for your outbound and return journeys, from $169 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 Philadelphia to Rapid City 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 Philadelphia to Rapid City 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 Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP) cost?
Discover the latest flight deals from PHL to RAP 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 PHL to RAP?
The cheapest flights from PHL to RAP 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 PHL to RAP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PHL to RAP. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP)?
There are no daily direct flights available from Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from PHL to RAP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP)?
To avoid potential delays on the Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP) route, travel before 3 PM. Later flights have a 22% higher chance of being 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 Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP) last-minute?
Last-minute fares from PHL to RAP are generally more expensive. To secure the best prices, start looking for flights ahead of time. That said, if you can play around with your travel dates, you may score a cheap ticket right before your journey.
Is it cheaper to book a PHL to RAP flight and hotel package?
You can save money by securing a PHL to RAP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your ideal accommodations and flights, consider adding extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Rapid City Regional Airport (RAP)?
In most cases, you're able to reschedule or cancel your PHL to RAP flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like further details, visit our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.