Back Bay skyline across the Charles River from the Longfellow Bridge. Flights from Denver to Boston

Route guide

Cheap Flights from Denver to Boston

Search Denver to Boston flights from Denver International (DEN) to Logan (BOS), with DEN checkpoint and train tips and the Logan terminals by airline.

DEN to BOS · 1,750 mi · 4h 19m est.

DEN to BOS
1,750 miles
4h 19m nonstop (estimated)
7 airlines in our fare results

Photo: King of Hearts, CC BY-SA 4.0, via Wikimedia Commons

Denver to Boston flight insights

Average flight time

~4h 19m (estimated)

DEN → BOS

Cheapest cached price

$178

Checking live fares…

Prices shown may not be current. Last checked: Oct 26, 2026.

Planning a trip from Denver to Boston? The average flight time on this route is ~4h 19m (estimated). The lowest fare we recorded on this route recently was $178 (last checked Oct 26, 2026); today's live fare for your dates can differ.

Denver to Boston at a glance

DEN to BOS is about 1,750 miles in a straight line. The curved line is an illustration; the route your airline flies may differ.

Route Quick Facts

Quick facts for flights from Denver to Boston on Eazair
Origin	Denver (DEN)
Destination	Boston (BOS)
Average Flight Time	~4h 19m (estimated)
Current Lowest Fare	$178
Fares Last Checked	Oct 26, 2026
Distance	1,750 miles (DEN to BOS)
Time in Boston	2 hours ahead of Denver
Airlines in our fare results	7

Local time in Boston is 2 hours ahead of Denver. Denver is on Mountain Time, Boston on Eastern Time.

Flight deals from Denver to Boston

Flights searched here leave Denver International (DEN) and arrive at Boston Logan International (BOS). Southwest, United, American, Delta, JetBlue, Sun Country and Frontier have appeared in EazAir's fare checks for this route. At the Boston end, Southwest and American list Terminal B, JetBlue lists Terminal C, and Delta's domestic flights use Terminal A or Terminal E. On United, Frontier or Sun Country, check your boarding pass or airline app for the Logan terminal.

Both of DEN's screening areas, East and West, sit on Level 6, and either one gets you to any airline gate. Their hours, as DEN gave them in August 2025, run 3 a.m. to 1 a.m., with TSA PreCheck and CLEAR at each, and DEN recommends getting there at least two hours before departure. Flying Delta, Frontier, JetBlue or Sun Country, which DEN lists at Concourse A, means you can skip the train and cross the A-Bridge, just north of the checkpoints.

Arriving at Logan, you can leave by boat: MBTA ferries run from the Logan Airport Ferry Terminal to Long Wharf, Lovejoy Wharf (North Station), Hingham and Hull, with more service in summer, and tickets are sold at fare machines, in the mTicket app or on board. On land, the Silver Line SL1 stops at every terminal and goes to South Station for the Red Line and Commuter Rail. The MBTA says that service from the airport is always free.

Thirteen checks for DEN to BOS, EazAir's first, were made between 12 Sep and 17 Oct 2026, each pulling the cheapest one-way economy fare partner sites offered one adult for a flight 30 days out. Twelve different results came back from those 13, the top one at least double the bottom, and the lowest landed on 19 Sep. Frontier without a bundle gives you a personal item only, with seats extra or assigned after check-in. Search your own dates, and check the final price, bags and fare rules on the partner site before you pay.

Airports for Denver to Boston flights

Departure · Denver

Denver International (DEN)

Mountain Time

Arrival · Boston

Logan International (BOS)

Eastern Time

About Boston

Areas to know in Boston

Back Bay
North End
Beacon Hill

Weather in Boston

Four distinct seasons: cold, snowy winters and warm, humid summers, with fall foliage drawing visitors through October.

Denver to Boston: airport and fare guide

Checked on 17 Oct 2026 against the airport, airline and transit pages listed under Sources. Airports and airlines change these details, so confirm them with your airline before you fly.

TF Green Airport is a separate airport. The MBTA says the Providence/Stoughton Commuter Rail line from South Station connects to it.

Leaving from Denver International (DEN)

Airline	DEN concourse
Delta	Concourse A
Frontier	Concourse A
JetBlue	Concourse A
Sun Country	Concourse A
United	Concourses A and B
Southwest	Concourse C
American	Concourse C
Other airlines	Check your boarding pass or airline app.

Ride the RTD A Line from Union Station to Denver Airport Station. RTD says an Airport Fare applies.
RTD also lists airport bus routes, including AB1 and AB2 from Boulder, AT and ATA from Arapahoe County and 145X from Brighton. RTD says SkyRide bus trips to or from DEN need an Airport Fare.
DEN's East and West security checkpoints are both on Level 6 and give access to all airline gates.
DEN said on 7 Oct 2026 that West Security is open from 3:30 a.m. to 1 a.m. and East Security from 3 a.m. to 8 p.m. daily. Both take TSA PreCheck and CLEAR.
DEN recommends arriving at least two hours before your flight to allow time for security, and its security page points travelers to real-time wait times.
The final phase of the Great Hall Program includes renovating airline check-in on the south end of Level 6, and DEN says the whole program will be done by the end of 2027.

Arriving at Boston Logan International (BOS)

Airline	Logan terminal
American	Terminal B, gates B4 to B22.
Delta	Terminal A and Terminal E for domestic flights. Check the Fly Delta app or My Trips for yours.
JetBlue	Terminal C for domestic flights and international departures. International arrivals use Terminal E.
Southwest	Terminal B.
Other airlines	Check your boarding pass or airline app.

Taken from each airline's own page on 17 Oct 2026, as Massport's airline list could not be checked. Terminals can change, so confirm yours with your airline.

The MBTA says the Silver Line SL1 bus and the free Massport Shuttle stop at every Logan terminal.
Delta runs a shuttle bus between Terminal A, near gates A13 to A22, and Terminal E, normally at gate E13, from 4:30 a.m. to 10:30 p.m. daily.
JetBlue lists Terminal C for its domestic flights and international departures, and Terminal E for international arrivals.

Getting from BOS	Where to board	Where it goes
MBTA Silver Line SL1	Stops at every Logan terminal. The MBTA says service from the airport is always free.	South Station, for the Red Line and Commuter Rail.
Massport Shuttle and MBTA Blue Line	The free Massport Shuttle picks up at every terminal and runs to Airport station. A fare applies on the Blue Line.	State and Government Center. Change at State for the Orange Line or at Government Center for the Green Line.
MBTA Silver Line SL3	Airport station, reached on the free Massport Shuttle.	Chelsea, with Commuter Rail and bus connections at Chelsea station.
MBTA ferry	Logan Airport Ferry Terminal. Buy tickets at fare machines, in the mTicket app, or on board.	Long Wharf, Lovejoy Wharf (North Station), Hingham and Hull, with more service in summer.

What the lowest fares include

Fare	Carry-on	Checked bag	Seat	Changes
Delta Main Basic	Delta says every passenger can bring one carry-on and one personal item free.	Delta charges for checked bags on domestic flights unless you qualify for a waiver, such as Medallion status or an eligible Delta SkyMiles American Express card.	Assigned after check-in. You may be able to buy a seat ahead of time for a fee.	Refunds are not allowed after the 24-hour risk-free cancellation window. Delta says a change or cancellation may be possible for a fee, with any value left as an eCredit.
American Basic Economy	Included, plus a personal item.	Not included, except for some AAdvantage status members and eligible cardmembers.	A free seat is assigned at check-in, or you can pay to choose one.	Generally not allowed. American describes a 24-hour window and some credit options on its Basic Economy page.
United Basic Economy	Not included on domestic flights. One personal item only, unless you are a MileagePlus Premier member, travel with one, or hold a qualifying MileagePlus card.	Not included; check United's bag fee calculator.	Assigned by United before boarding.	Changes may not be allowed. Refund if cancelled within 24 hours of booking, under United's 24-hour policy; after that, partial travel credit.
Southwest Basic	Southwest's policy allows one carry-on and one personal item.	Checked bag fees apply to Basic fares.	A free Standard seat is assigned at check-in. Preferred and Extra Legroom seats cost extra.	Only by upgrading to a Choice fare or higher. Cancelling at least 10 minutes before departure gives a flight credit, which for Basic expires 6 months from booking.
JetBlue Main Base (bookings made after 29 Jul 2026)	Included, plus a personal item.	Not included.	Costs extra.	Change fee plus any fare difference. Cancelling gives travel credit minus a fee.
Frontier, without a bundle	Not included. One personal item only.	Not included. Prices vary by travel date and when you buy.	Costs extra, or a seat is assigned after check-in.	Not covered here. Check Frontier's rules before you book.
Sun Country base fare	Not included. The base fare includes a personal item.	Not included.	Costs extra to choose, or a seat is assigned at check-in.	A change fee and any fare difference may apply. Sun Country says to cancel the original reservation before departure to change the ticket.

Based on the airlines' own pages, checked on 17 Oct 2026. Fees are left out because they change often. Check the final price, bags and fare rules on the partner site before you pay.

How EazAir measured fares on this route

EazAir's first 13 fare checks from Denver to Boston ran from 12 Sep to 17 Oct 2026. For the return direction, Boston to Denver, EazAir's first 14 checks ran from 5 Sep to 15 Oct 2026. Each check asked partner travel sites for the lowest one-way economy fare for one adult, departing 30 days after the check. Results can include connecting flights. The highest result was at least double the lowest. The 13 checks returned 12 different results. The lowest result came on 19 Sep. That is a small sample, so it shows that prices move, not when they are lowest. Search your own dates for current prices.

Sources

DEN: Airlines (no date shown, accessed 17 Oct 2026)
DEN: Security (no date shown, accessed 17 Oct 2026)
DEN: Great Hall Program (no date shown, accessed 17 Oct 2026)
DEN: East security checkpoint opens (4 Aug 2025, accessed 17 Oct 2026)
DEN: Passenger surge during Fall Break travel rush (7 Oct 2026, accessed 26 Oct 2026)
RTD: Airport (no date shown, accessed 17 Oct 2026)
MBTA: Logan Airport (no date shown, accessed 17 Oct 2026)
JetBlue: Boston airport information (no date shown, accessed 17 Oct 2026)
Delta: Boston airport update (no date shown, accessed 17 Oct 2026)
American: Boston airport information (no date shown, accessed 17 Oct 2026)
Southwest: Airport information, Boston Logan (no date shown, accessed 17 Oct 2026)
Delta: Delta Main Basic (no date shown, accessed 17 Oct 2026)
Delta: Fares and discounts (no date shown, accessed 17 Oct 2026)
Delta: Carry-on baggage (no date shown, accessed 17 Oct 2026)
Delta: Bags (no date shown, accessed 17 Oct 2026)
American Airlines: Basic Economy (no date shown, accessed 17 Oct 2026)
United: Basic Economy FAQ (no date shown, accessed 17 Oct 2026)
Southwest: Fare information (no date shown, accessed 17 Oct 2026)
Southwest: Assigned seating (no date shown, accessed 17 Oct 2026)
Southwest: Carry-on baggage policy (no date shown, accessed 17 Oct 2026)
Southwest: Fare types and benefits (no date shown, accessed 17 Oct 2026)
JetBlue: Fare options (no date shown, accessed 17 Oct 2026)
Frontier: What is included in my fare (last modified 25 Mar 2026, accessed 17 Oct 2026)
Frontier: Bag options (no date shown, accessed 17 Oct 2026)
Frontier: Bundles (no date shown, accessed 17 Oct 2026)
Sun Country Stories: Your first Sun Country flight? Here's what to expect from booking to boarding (Jul 10, 2025, accessed 17 Oct 2026)
Sun Country: Contract of Carriage (Updated October 15, 2025, accessed 17 Oct 2026)
EazAir fare checks for DEN to BOS, 12 Sep 2026 to 17 Oct 2026; BOS to DEN, 5 Sep 2026 to 15 Oct 2026

Frequently asked questions

What time does security open at Denver airport?

DEN said in August 2025 that its East and West checkpoints both open from 3 a.m. to 1 a.m., closing from 1 a.m. to 3 a.m. Both are on Level 6 and take TSA PreCheck and CLEAR.

Do I need the train to reach my gate at DEN?

For Concourses B and C, yes: DEN says to go down to the Level 4 train platform after security. With an A gate boarding pass, you can walk the A-Bridge, directly north of the checkpoints.

How do I get to DEN on public transit?

Ride the RTD A Line from Union Station to Denver Airport Station. RTD also lists airport bus routes from Boulder, Arapahoe County and Brighton, and says train and SkyRide bus trips to or from DEN need an Airport Fare.

Can I take a ferry from Logan Airport?

Yes. MBTA ferries leave the Logan Airport Ferry Terminal for Long Wharf, Lovejoy Wharf (North Station), Hingham and Hull, with more service in summer. Tickets are sold at fare machines, in the mTicket app or on board.

Do the lowest fares from Denver to Boston include a carry-on?

Delta, American, JetBlue and Southwest include one. United Basic Economy, Frontier without a bundle and Sun Country's base fare include a personal item only, with United exceptions for some MileagePlus members and cardholders.

How far is Denver from Boston?

DEN and BOS are about 1750 miles apart in a straight line. Flight times vary by airline, direction and routing, so check the scheduled time shown with each result.

Airline bag fees

Baggage allowances differ significantly between fare classes (Basic/Light vs. Standard/Flex) and can change over time. Always verify the exact allowance for your specific fare with the airline before you fly.

Checked bag fees from each airline's own website
Airline	Carry-on, basic economy	1st checked bag	2nd checked bag	Source
American Airlines	Included	$45	$55	aa.com, Sep 24, 2026
United Airlines	Not included	$40	$50	united.com, Sep 24, 2026
Delta Air Lines	Included	$45	$55	delta.com, Sep 24, 2026
Southwest Airlines	Included	$45	$55	southwest.com, Oct 27, 2026
JetBlue	Included	$45	$59	jetblue.com, Sep 24, 2026
Alaska Airlines	Included	$45	$55	alaskaair.com, Sep 24, 2026
Frontier Airlines	Not included	Varies	Varies	flyfrontier.com, Sep 24, 2026
Sun Country Airlines	Not included	Varies	Varies	suncountry.com, Sep 24, 2026

Domestic US fees per bag, each way, when paid online in advance. "Varies" means the airline prices bags by route and date.

Travel tips

Arrive early for domestic flights

TSA generally recommends arriving at least 2 hours before a domestic departure, more at larger hub airports during peak travel periods.

Pack a mixed carry-on

Keep a change of clothes, chargers, and any essentials in your carry-on rather than only your checked bag, in case of a delay or a bag that doesn't arrive with you.

Ease jet lag on longer routes

On longer cross-country flights, adjusting your sleep schedule a day or two before departure and staying hydrated in flight can reduce jet lag on arrival.

Screenshot your confirmation

Save a screenshot or PDF of your booking confirmation and boarding pass before you travel, in case you lose signal or battery at the airport.

Check in online when it opens

Most airlines open online check-in 24 hours before departure. Checking in early can help with seat selection and, on some airlines, boarding group assignment.