Cheap flights from Baltimore to Boston from $146 BWI → BOS

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $124 to $346.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold 4-night return fares on 1 other departure date within 3 days of 10 Dec, and it is not cheaper.

Every date we hold

18 fares on 5 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $169.

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $52 to $75.

At $146, the cheapest one-way found recently is above that range.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 21 Nov to compare.

Every date we hold

6 fares on 6 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $81.

Return

Fares 30 to 59 days before departure were typically 64% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 14 to 29 days before departure were typically 76% lower than 7 to 13 days before departure.

From the cheapest one-way each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Baltimore to Boston?

The cheapest return found recently is $175 with Southwest Airlines, 10 Dec to 14 Dec, found 2 days ago. The cheapest return we hold, of any age, is $169 with Southwest Airlines, 10 Dec to 14 Dec, found 7 days ago. The cheapest return fare on each of 5 departure dates is usually $226 to $339.

How much is a one-way flight from Baltimore to Boston?

The cheapest one-way found recently is $146 with Frontier Airlines, 21 Nov, found 2 days ago. The cheapest one-way we hold, of any age, is $81 with Southwest Airlines, 2 Dec, found 5 days ago. The cheapest one-way fare on each of 6 departure dates is usually $82 to $98.

What is the cheapest month to fly from Baltimore to Boston?

December 2026 is the cheapest month for a return, from $169, 10 Dec to 14 Dec, found 7 days ago. It is the cheapest month for a one-way too, from $81, 2 Dec, found 5 days ago.

How far ahead should I book a flight from Baltimore to Boston?

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 64% lower than 0 to 6 days before departure. One-way fares 14 to 29 days before departure were typically 76% lower than 7 to 13 days before departure.

Is there a direct flight from Baltimore to Boston?

Yes, the cheapest nonstop return found recently is $211 with Southwest Airlines, 10 Dec to 14 Dec, found 2 days ago. The cheapest nonstop one-way found recently is $81 with Southwest Airlines, 9 Jan 2027, found 4 days ago.

How long is the flight from Baltimore to Boston?

The cheapest nonstop one-way found recently, with Southwest Airlines on 9 Jan 2027, takes 1 h 30 min from Baltimore/Wash International Thurgood Marshall Airport (BWI) to Logan International Airport (BOS).

Which airlines have the cheapest flights from Baltimore to Boston?

Between 26 Nov and 12 May 2027, Southwest Airlines has the cheapest return on all 5 departure dates we hold. Between 21 Nov and 24 Feb 2027, Southwest Airlines has the cheapest one-way on 5 of the 6 departure dates we hold, and Frontier Airlines on 1.