HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$132+ Cheap flights from Baltimore (BWI) to Idaho

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — BOI
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Baltimore to Idaho

Cheapest flights from Baltimore to Idaho
Explore the most affordable flight options available from Baltimore to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.

This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/289:05 am
BWI
-
BOI
1 stop8h 20m
Southwest
Tue 5/52:00 pm
BOI
-
BWI
1 stop8h 25m
Southwest
Deal found 4/7$263
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:25 am
BWI
-
BOI
1 stop8h 45m
Southwest
Tue 6/25:00 pm
BOI
-
BWI
2 stops10h 30m
Southwest
Deal found 4/9$268
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
BWI
-
BOI
1 stop9h 07m
Delta
Mon 5/43:23 pm
BOI
-
BWI
1 stop6h 03m
Delta
Deal found 4/7$283
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:03 am
BWI
-
BOI
2 stops10h 23m
Delta
Sat 5/22:18 pm
BOI
-
BWI
1 stop8h 20m
Delta
Deal found 4/8$288
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:00 am
BWI
-
BOI
1 stop9h 07m
Delta
Thu 4/3011:35 pm
BOI
-
BWI
1 stop8h 01m
Delta
Deal found 4/9$291
This Southwest deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:05 pm
BWI
-
BOI
2 stops9h 20m
Southwest
Wed 5/65:00 pm
BOI
-
BWI
2 stops10h 30m
Southwest
Deal found 4/8$293
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:00 am
BWI
-
BOI
1 stop9h 07m
Delta
Sat 5/210:45 am
BOI
-
BWI
2 stops10h 41m
Delta
Deal found 4/9$296
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:15 am
BWI
-
GEG
1 stop7h 58m
Delta
Sat 5/91:30 pm
GEG
-
BWI
1 stop6h 55m
Delta
Deal found 4/9$297
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/94:12 pm
BWI
-
BOI
1 stop8h 23m
United Airlines
Wed 5/136:58 pm
BOI
-
BWI
1 stop10h 22m
United Airlines
Deal found 4/9$301
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
BWI
-
GEG
1 stop8h 41m
Delta
Wed 5/135:37 pm
GEG
-
BWI
2 stops9h 08m
Delta
Deal found 4/5$302
This deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
BWI
-
BOI
1 stop9h 07m
Delta
Sat 5/23:23 pm
BOI
-
BWI
1 stop6h 03m
Delta
Deal found 4/6$305
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:10 am
BWI
-
BOI
1 stop9h 24m
Delta
Mon 9/1411:30 pm
BOI
-
BWI
1 stop7h 46m
Delta
Deal found 4/8$306

Find flight deals from Baltimore to Idaho

Keep the following information in mind while searching for Baltimore to Idaho flight deals. Data was last updated April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$263
(Southwest)

One-way from

$132
(Delta)

Popular in

December

Cheapest in

April

Average price

$245
Provider with most accurate pricing for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flights.
Search Deals
From Baltimore/Washington to Idaho
Search Deals
One-way flight from Baltimore/Washington to Idaho
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 10, 2026.
Use the filters below to find and compare flights from Baltimore to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Wed 6/3

6:25 pm-12:25 am

1 stop8h 00m

Boise Air Term. Gowen Fld

Mon 6/8

12:05 pm-12:05 am

1 stop10h 00m

$263

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 7/14

7:12 am-12:13 pm

1 stop7h 01m

Boise Air Term. Gowen Fld

Mon 7/20

11:42 pm-9:24 am

1 stop7h 42m

$263

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 4/28

6:00 am-1:07 pm

1 stop9h 07m

Boise Air Term. Gowen Fld

Mon 5/4

3:23 pm-11:26 pm

1 stop6h 03m

$283

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Tue 4/28

6:00 am-11:41 am

1 stop8h 41m

Spokane

Wed 5/13

10:40 pm-9:23 am

1 stop7h 43m

$297

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Sat 5/9

4:12 pm-10:35 pm

1 stop8h 23m

Boise Air Term. Gowen Fld

Wed 5/13

6:58 pm-7:20 am

1 stop10h 22m

$301

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Wed 5/6

3:25 pm-11:25 pm

1 stop11h 00m

Spokane

Wed 5/13

2:25 pm-5:40 am

1 stop12h 15m

$302

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Fri 5/29

4:51 pm-9:20 pm

1 stop7h 29m

Spokane

Mon 6/1

10:40 pm-10:44 am

1 stop9h 04m

$309

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Wed 6/10

11:35 am-6:23 pm

2 stops9h 48m

Spokane

Sat 6/20

5:05 pm-5:50 am

1 stop9h 45m

$314

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Fri 5/29

4:17 pm-11:06 pm

1 stop9h 49m

Spokane

Mon 6/1

7:25 pm-3:17 pm

1 stop16h 52m

$329

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Fri 8/14

7:00 pm-11:04 pm

1 stop7h 04m

Spokane

Thu 8/20

10:45 pm-9:16 am

1 stop7h 31m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Baltimore to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Baltimore with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Baltimore to Idaho

What is the cheapest month to book a flight from Baltimore to Idaho?

Currently, September is the cheapest month in which you can book a flight from Baltimore to Idaho (average of $150). Flying from Baltimore to Idaho in November is currently the most expensive (average of $301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Baltimore to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated April 10, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Baltimore to Idaho by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,335 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,206 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,398 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,562 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

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

  • What airport do you fly from for flights from Baltimore to Idaho?

    Most people fly from Baltimore/Washington (BWI) if they book a flight from Baltimore to Idaho. Baltimore/Washington is conveniently located just 8.5 mi from Baltimore’s city center.

  • How long is the flight from Baltimore to Idaho?

    Southwest, Delta, and United Airlines can get you from Baltimore to Idaho in just under 7h 01m. Your travel time can differ by up to 1h 22m. The distance between Baltimore and Idaho is about 2052 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Baltimore to Idaho one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $143. Users have also found prices from $163 and $197 on United Airlines and Southwest, respectively.

  • What are the most popular routes from Baltimore to Idaho?

    The most popular route from Baltimore to Idaho is Baltimore/Washington - Jackson Hole. You may also consider Baltimore/Washington - Boise Air Term. Gowen Fld or Baltimore/Washington - Spokane.

  • Can I find deals for flights from Baltimore to Idaho that include hotel bookings?

    Yes. In addition to deals on Baltimore to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Baltimore to Idaho?

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

  • Can I find deals for business class flights from Baltimore to Idaho?

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

  • What is the cheapest month to book a flight from Baltimore to Idaho?

    Currently, September is the cheapest month in which you can book a flight from Baltimore to Idaho (average of $150). Flying from Baltimore to Idaho in November is currently the most expensive (average of $301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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 Baltimore to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to Seattle flights
Dulles Intl to Las Vegas flights
Philadelphia to Orlando flights
Reagan-National to Miami flights
Dulles Intl to Miami flights
Baltimore to Miami flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Los Angeles flights
Reagan-National to Las Vegas flights
Baltimore to O'Hare Intl flights
Baltimore to Las Vegas flights
Reagan-National to Seattle flights
Dulles Intl to Atlanta flights
Dulles Intl to Orlando flights
Dulles Intl to O'Hare Intl flights
Baltimore to Los Angeles flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Los Angeles flights
Baltimore to Atlanta flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to Denver flights
Baltimore to Fort Lauderdale flights
Reagan-National to Orlando flights
Dulles Intl to Hobby flights
Reagan-National to Atlanta flights
Baltimore to Denver flights
Philadelphia to Las Vegas flights
Baltimore to Seattle flights
Dulles Intl to San Francisco flights
Philadelphia to O'Hare Intl flights
Dulles Intl to Fort Lauderdale flights
Philadelphia to Fort Lauderdale flights
Reagan-National to San Francisco flights
Reagan-National to Hobby flights
Philadelphia to Miami flights
Dulles Intl to Tampa flights
Philadelphia to Denver flights
Baltimore to Orlando flights
Baltimore to San Francisco flights
Philadelphia to Seattle flights
Philadelphia to Dallas/Fort Worth flights
Reagan-National to Boston flights
Dulles Intl to New Orleans flights
Dulles Intl to Boston flights
Dulles Intl to George Bush Intcntl flights
Baltimore to Hobby flights
Baltimore to Tampa flights
Philadelphia to Atlanta flights
Reagan-National to Fort Lauderdale flights

Top 4 airlines flying from Baltimore to Idaho

Discover the top 4 airlines that operate flights from Baltimore to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$208Average$458FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$275Average$634FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$321Average$393FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$351Average$487FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.