$233 Cheap Flights from Waterloo (ALO) to Baltimore (BWI)

View $233 flight on Wed, Mar 4, 2026Opens in a new window

Popular airlines from Waterloo, IA (ALO-Waterloo Regional) to Baltimore Washington Intl. Airport (BWI)

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Cheap Flights from Waterloo to Baltimore (ALO-BWI)

Prices were available within the past 7 days and start at $233 for one-way flights and $309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Apr 25 - Fri, May 1
ALO
Waterloo
BWI
Baltimore
$309 Roundtrip, found 5 days ago
$309
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Apr 25 from Waterloo to Baltimore, returning Fri, May 1, priced at $309 found 5 days ago
American Airlines
Sat, Apr 18 - Sun, Apr 19
ALO
Waterloo
BWI
Baltimore
$314 Roundtrip, found 1 day ago
$314
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Apr 18 from Waterloo to Baltimore, returning Sun, Apr 19, priced at $314 found 1 day ago
American Airlines
Wed, Mar 4 - Wed, Mar 11
ALO
Waterloo
BWI
Baltimore
$329 Roundtrip, found 4 days ago
$329
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Mar 4 from Waterloo to Baltimore, returning Wed, Mar 11, priced at $329 found 4 days ago
American Airlines
Sat, May 2 - Tue, May 19
ALO
Waterloo
BWI
Baltimore
$399 Roundtrip, found 3 days ago
$399
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, May 2 from Waterloo to Baltimore, returning Tue, May 19, priced at $399 found 3 days ago
American Airlines
Sat, Apr 18 - Sun, Apr 19
ALO
Waterloo
BWI
Baltimore
$404 Roundtrip, found 1 day ago
$404
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Apr 18 from Waterloo to Baltimore, returning Sun, Apr 19, priced at $404 found 1 day ago
American Airlines
Fri, Feb 27 - Mon, Mar 2
ALO
Waterloo
BWI
Baltimore
$409 Roundtrip, found 2 days ago
$409
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Feb 27 from Waterloo to Baltimore, returning Mon, Mar 2, priced at $409 found 2 days ago
American Airlines
Sat, Apr 25 - Sat, May 2
ALO
Waterloo
BWI
Baltimore
$416 Roundtrip, found 1 day ago
$416
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Apr 25 from Waterloo to Baltimore, returning Sat, May 2, priced at $416 found 1 day ago
American Airlines
Wed, Mar 4 - Wed, Mar 11
ALO
Waterloo
BWI
Baltimore
$419 Roundtrip, found 4 days ago
$419
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Mar 4 from Waterloo to Baltimore, returning Wed, Mar 11, priced at $419 found 4 days ago
American Airlines
Sat, Apr 25 - Sat, May 2
ALO
Waterloo
BWI
Baltimore
$421 Roundtrip, found 1 day ago
$421
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Apr 25 from Waterloo to Baltimore, returning Sat, May 2, priced at $421 found 1 day ago
American Airlines
Thu, Apr 30 - Sun, May 3
ALO
Waterloo
BWI
Baltimore
$423 Roundtrip, found 1 day ago
$423
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Apr 30 from Waterloo to Baltimore, returning Sun, May 3, priced at $423 found 1 day ago

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Alternative airports near Baltimore

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

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $625
BWI
Baltimore Washington Intl. Thurgood Marshall
CheapestClosest
Average driving time to city center16 min
Flights from $625

Frequently asked questions

How much does a flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) cost?
You can find cheap one-way flights from $233 and cheap return flights from $309 Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) with Expedia. One-way flights usually range from $390 to $461, and return flights typically cost between $298 and $974. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
The cheapest month to fly from ALO to BWI is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
Enter ALO to BWI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
American Airlines is one of the cheapest airlines offering connecting flights from Waterloo Regional (ALO) to Baltimore Washington Intl. Thurgood Marshall (BWI) with return tickets starting from around $248. You can find connecting flights with a layover in Washington Dulles Intl. (IAD). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
To find a cheap flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
The earliest flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) typically departs at around 5:40 AM local time, operated by American Airlines. This seasonal service is available in December, allowing you to start your travel day early. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
The most popular departure times for flights from Waterloo, IA (ALO) to Baltimore, MD (BWI) are in the early morning, from 3am to 6am. About 38% of passengers prefer this time window. Many major carriers, including American Airlines, offer flights during this window. This timing works well because it allows you to arrive in Baltimore with a full day ahead of you.
How long does it take to fly from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
Flying from ALO to BWI with a connection usually takes about 7 hours 30 minutes, traveling roughly 853 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
First class seats are offered on the ALO to BWI route with American Airlines.
How do I earn miles on a Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) flight with Expedia?
It's easy to earn miles on a Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Baltimore from Waterloo Regional (ALO)?
From Waterloo Regional (ALO), you can fly into Baltimore Washington Intl. Thurgood Marshall (BWI) to reach Baltimore. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) at the last minute?
Typically, booking a last minute flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) flight and hotel package?
Securing a Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) Baltimore Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall)?
If you booked your Waterloo, IA (ALO-Waterloo Regional) to Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Waterloo Regional
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
American Airlines
Roundtrip price
$308
Distance
852 mi

Book with confidence

Waterloo to Baltimore Flights

The cheapest times to fly from Waterloo to Baltimore

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

 

The best time to book a flight from Waterloo to Baltimore

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

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 Waterloo to Baltimore in 2026. You can also book with separate airlines for your outbound and return journeys, from $233 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 Waterloo to Baltimore 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 Waterloo to Baltimore 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.

 

Waterloo to Baltimore Flights

*Flight schedules are subject to change.

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*Available to One Key members.