What is the cheapest airline to fly from Rapid City to Portland, Maine round-trip?

Our cheapest airline available from Rapid City to Portland, Maine is American Airlines. Our recent data shows that you can find tickets from as low as $378 on this airline.

In terms of precipitation, rainfall in Portland, Maine ranges from 2.9 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. August is typically the driest time to visit Portland, Maine when rainfall is around 2.9 in.

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest time of day to fly from RAP to PWM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rapid City to Portland, Maine as you normally would.

Most accurate provider : When it comes to deals on Rapid City-Portland, Maine flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Rapid City-Portland, Maine flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Rapid City-Portland, Maine flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Rapid City-Portland, Maine flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Rapid City to Portland that include hotel bookings?

Yes. In addition to deals on Rapid City to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Rapid City to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to Portland.

Can I find deals for business class flights from Rapid City to Portland?

Yes. Cheapflights offers flight deals from Rapid City to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Find Cheap Flights from Rapid City to Portland, ME

Q: E

Most trusted provider : When it comes to deals on Rapid City-Portland, Maine flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Q: Can I find deals for flights from Rapid City to Portland that include hotel bookings?

Yes. In addition to deals on Rapid City to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

Q: How can I find direct flights from Rapid City to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to Portland.

Q: Can I find deals for business class flights from Rapid City to Portland?

Yes. Cheapflights offers flight deals from Rapid City to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Find flight deals from Rapid City to Portland

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars

Provider with most accurate pricing for Rapid City-Portland flight deals.

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Provider most trusted by Cheapflights users for Rapid City-Portland flights.

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Most accurate provider: When it comes to deals on Rapid City-Portland, Maine flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Rapid City-Portland, Maine flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Rapid City-Portland, Maine flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Rapid City-Portland, Maine flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Rapid City to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Rapid City with our price prediction graph.

RAP-PWM

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Portland

Peruse reviews from past customers who have flown with American Airlines from Rapid City to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.1

Good

11,668 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

American Airlines

7.1

Good

11,668 reviews

American Airlines

7.1

Good

11,668 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

Related info for your journey

What is the cheapest airline to fly from Rapid City to Portland, Maine round-trip?
Our cheapest airline available from Rapid City to Portland, Maine is American Airlines. Our recent data shows that you can find tickets from as low as $378 on this airline.
Can I find deals for flights from Rapid City to Portland that include hotel bookings?
Yes. In addition to deals on Rapid City to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Rapid City to Portland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to Portland.
Can I find deals for business class flights from Rapid City to Portland?
Yes. Cheapflights offers flight deals from Rapid City to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top airline flying from Rapid City to Portland

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$378	Average$670	FlexibilityNo cancel fee	On-time71%

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Find cheap flights from Rapid City to Portland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Rapid City to Portland

Most accurate provider

Most trusted provider

Best time to book a flight from Rapid City to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Rapid City with our price prediction graph.

Reviews of airlines servicing Portland

Peruse reviews from past customers who have flown with American Airlines from Rapid City to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Rapid City to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from Rapid City to Portland, Maine round-trip?

Can I find deals for flights from Rapid City to Portland that include hotel bookings?

How can I find direct flights from Rapid City to Portland?

Can I find deals for business class flights from Rapid City to Portland?

Traveling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Rapid City to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Rapid City to Portland by cabin class

Find flights from Rapid City to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Rapid City and Portland flights

Browse other Rapid City and Portland flight options. Last updated on May 7, 2026.

Other flights from Rapid City

Browse through other flights departing from Rapid City. Flights are based on user searches made on Cheapflights and were last updated on May 7, 2026.

Popular flight searches

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Other flights to Portland

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Top airline flying from Rapid City to Portland

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Cheap flights from Rapid City to Portland, ME (RAP - PWM)

Find cheap flights from Rapid City to Portland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Rapid City to Portland

Most accurate provider

Most trusted provider

Best time to book a flight from Rapid City to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Rapid City with our price prediction graph.

Reviews of airlines servicing Portland

Peruse reviews from past customers who have flown with American Airlines from Rapid City to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Rapid City to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from Rapid City to Portland, Maine round-trip?

Can I find deals for flights from Rapid City to Portland that include hotel bookings?

How can I find direct flights from Rapid City to Portland?

Can I find deals for business class flights from Rapid City to Portland?

Traveling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Rapid City to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Rapid City to Portland by cabin class

Find flights from Rapid City to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Rapid City and Portland flights

Browse other Rapid City and Portland flight options. Last updated on May 7, 2026.

Other flights from Rapid City

Browse through other flights departing from Rapid City. Flights are based on user searches made on Cheapflights and were last updated on May 7, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Other flights to Portland

Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 7, 2026.

Top airline flying from Rapid City to Portland

100% Free

Book with Flexibility

Travel Smart