Flights Denver → Boston — September 14, 2026

One way · Economy · 1 adult · price per person

The cheapest flight observed for Monday, September 14, 2026 on the Denver–Boston route: Southwest Airlines WN233, from Denver International (DEN) to Boston Logan (BOS), departs 6:30 PM, arrives 12:35 AM the next day, direct, 4h 5m, $258 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 4, 2026 and read by AirSource on September 10, 2026, 20:47 UTC: it is not guaranteed and is confirmed on Aviasales at booking time.

Lowest price observed in the available data

Southwest Airlines WN233

Direct · Denver International (DEN) → Boston Logan (BOS)

Direct

6:30 PM

Mon, Sep 14

Denver International (DEN)

4h 5m

direct

12:35 AM⁺¹

Tue, Sep 15

Boston Logan (BOS)

Airline: Southwest Airlines (WN)
Flight: WN233
Departure: Denver International (DEN) · September 14, 2026 · 6:30 PM local time (UTC-6)
Arrival: Boston Logan (BOS) · September 15, 2026 · 12:35 AM local time (UTC-4) · next day
Stops: Direct (no plane change, as stated by the source; it can include a stop)
Duration: 4h 5m
Carry-on bag: not included (personal item only)
Checked bag: not included
Changes: not allowed
Refund: non-refundable
Last observed price: $258 per person, one way
Observed: Price and fare conditions found in an Aviasales search on September 4, 2026 · read by AirSource on September 10, 2026, 20:47 UTC · more than 48 hours ago

Looking for other times? All Denver–Boston flights on September 14, 2026 on Aviasales.

Lowest price observed in the available data

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