Downtown Denver skyline from City Park with the Rocky Mountains behind. Flights from Boston to Denver

Route guide

Cheap Flights from Boston to Denver

Compare Boston to Denver flights from Logan (BOS) to Denver International (DEN), with each airline's DEN concourse and the RTD A Line into Union Station.

BOS to DEN · 1,750 mi · 4h 19m est.

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

Photo: David Herrera, CC BY 2.0, via Wikimedia Commons

Boston to Denver flight insights

Average flight time

~4h 19m (estimated)

BOS → DEN

Cheapest cached price

$154

Checking live fares…

Prices shown may not be current. Last checked: Oct 19, 2026.

Planning a trip from Boston to Denver? The average flight time on this route is ~4h 19m (estimated). The lowest fare we recorded on this route recently was $154 (last checked Oct 19, 2026); today's live fare for your dates can differ.

Boston to Denver covers a straight-line distance of about 1,750 miles. Based on that distance, a nonstop flight would take approximately ~4h 19m (estimated). Actual flight time varies by airline, aircraft and routing.

Boston to Denver at a glance

BOS to DEN 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 Boston to Denver on Eazair
Origin	Boston (BOS)
Destination	Denver (DEN)
Average Flight Time	~4h 19m (estimated)
Current Lowest Fare	$154
Fares Last Checked	Oct 19, 2026
Distance	1,750 miles (BOS to DEN)
Time in Denver	2 hours behind Boston
Airlines in our fare results	7

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

Flight deals from Boston to Denver

Denver International (DEN) is the arrival airport for this search, and flights leave from Boston Logan International (BOS). Southwest, Frontier, American, United, JetBlue, Delta and Sun Country have appeared in EazAir's fare checks for this route. At DEN, Concourse A is listed for Delta, Frontier, JetBlue and Sun Country, Concourse C for Southwest and American, and both A and B for United. The airline page shows no update date, so confirm the concourse on your boarding pass.

On the MBTA Blue Line, get off at Airport station and take the free Massport Shuttle, which stops at every Logan terminal; the Blue Line itself connects with the Orange Line at State and the Green Line at Government Center. Southwest lists Terminal B at Logan. JetBlue, in Terminal C, asks travelers to arrive 2 hours before domestic flights. For Sun Country, look at your boarding pass or airline app for the Logan terminal.

DEN keeps every gate past security, on Concourses A, B and C, with a train running out to them from Jeppesen Terminal. Into the city, RTD's A Line departs the Transit Center on Level 1, under the Westin Denver International Hotel, every 15 minutes, and DEN lists 37 minutes to Union Station; RTD says an Airport Fare applies. Uber and Lyft use Level 5, Island 5, East or West side, while taxi stands are at Island 1.

Between 5 Sep and 15 Oct 2026, EazAir made its first 14 fare checks for BOS to DEN, each capturing the cheapest one-way economy fare partner sites showed for a single adult, 30 days ahead. Those checks produced 11 different results, the lowest result came on 6 Oct, and the highest was at least double the lowest. Sun Country's base fare includes a personal item but not a carry-on. Search your own dates, and check the final price, bags and fare rules on the partner site before you pay.

Airports for Boston to Denver flights

Departure · Boston

Logan International (BOS)

Eastern Time

Arrival · Denver

Denver International (DEN)

Mountain Time

About Denver

Areas to know in Denver

LoDo (Lower Downtown)
RiNo Art District
Capitol Hill

Weather in Denver

A semi-arid climate with over 300 sunny days a year; the high altitude keeps evenings cool even in summer, and winter brings snow to the nearby mountains.

Boston to Denver: 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 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.

The SL1 bus stops at every Logan terminal, and the MBTA says transfers from the Red Line to the SL1 are free when you head to the airport.
On the Blue Line, get off at Airport station and take the free Massport Shuttle, which stops at every terminal.
MBTA ferries serve the Logan Airport Ferry Terminal from Long Wharf, Lovejoy Wharf, Hingham and Hull, with more service in summer.
JetBlue asks travelers at Logan to arrive 2 hours before domestic flights and 3 hours before international flights.
Delta says its domestic flights leave from both Terminal A and Terminal E, so check the Fly Delta app or My Trips before you go through security.
JetBlue lists Logan ticket counter hours of 2:30 a.m. to 11:30 p.m. American lists its Terminal B ticket counters as open daily from 3 a.m. to 9 p.m.
When the E3 checkpoint in Terminal E opened, TSA said it had seven screening lanes and that the E2 checkpoint would serve as overflow when volumes are heavy.

Arriving at 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.

DEN's airline page shows no update date, so confirm your concourse on your boarding pass.

DEN has three concourses, A, B and C, beyond security. The train to the gates links them with Jeppesen Terminal.
The train leaves from a platform on Level 4. DEN says the ride from the terminal to the C Gates takes less than 10 minutes.
With an A gate boarding pass you can walk the A-Bridge, directly north of the security checkpoints, instead of taking the train.
In Jeppesen Terminal, even-numbered doors are on the west side and odd-numbered doors are on the east side.

Getting from DEN	Where to board	Where it goes
RTD A Line	Transit Center on Level 1, beneath the Westin Denver International Hotel. DEN says trains run every 15 minutes. RTD says trips to or from the airport need an Airport Fare.	Union Station in downtown Denver, 37 minutes according to DEN, with stops at 61st & Peña, 40th & Airport and 38th & Blake.
Rideshare	Level 5, Island 5, on the East or West side of the terminal. DEN says to order your ride after collecting your luggage.	Wherever you booked.
Taxis	Level 5, Island 1. DEN says taxis are available 24 hours a day and you can go straight to the stands after baggage claim.	Your destination.
Mountain carriers	Level 5, Island 4.	The carrier's own routes.
Hotel and rental car shuttles	Hotel shuttles pick up on Level 5. A free rental car shuttle runs from the Jeppesen Terminal pickup area.	Hotels and the off-site rental car counters.

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 14 fare checks from Boston to Denver ran from 5 Sep to 15 Oct 2026. For the return direction, Denver to Boston, EazAir's first 13 checks ran from 12 Sep to 17 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 14 checks returned 11 different results. The lowest result came on 6 Oct. That is a small sample, so it shows that prices move, not when they are lowest. Search your own dates for current prices.

Sources

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)
TSA: International checkpoint opens in Logan Terminal E (no date shown, accessed 17 Oct 2026)
DEN: Airlines (no date shown, accessed 17 Oct 2026)
DEN: Facilities (no date shown, accessed 17 Oct 2026)
DEN: To and from the airport (no date shown, accessed 17 Oct 2026)
DEN: East security checkpoint opens (4 Aug 2025, accessed 17 Oct 2026)
RTD: Airport (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 BOS to DEN, 5 Sep 2026 to 15 Oct 2026; DEN to BOS, 12 Sep 2026 to 17 Oct 2026

Frequently asked questions

Which DEN concourse does my airline use?

DEN lists Delta, Frontier, JetBlue and Sun Country at Concourse A, United at Concourses A and B, and Southwest and American at Concourse C. Confirm on your boarding pass, as the list has no update date.

How do I get from Denver airport to Union Station?

Take the RTD A Line from the Transit Center on Level 1, beneath the Westin Denver International Hotel. DEN lists a 37-minute trip and trains every 15 minutes. RTD says an Airport Fare applies.

Where do Uber and Lyft pick up at DEN?

At Level 5, Island 5, on either the East or West side of Jeppesen Terminal. DEN says to order your ride after collecting your luggage. Taxis are at Level 5, Island 1.

Can I take the Blue Line to Logan?

Yes. Get off at Airport station and take the free Massport Shuttle, which stops at every terminal. The Blue Line connects with the Orange Line at State and the Green Line at Government Center.

Do the lowest fares on this route include a carry-on?

Delta, American, JetBlue and Southwest include a carry-on with their lowest fares. United Basic Economy, Frontier without a bundle and Sun Country's base fare include only a personal item, though United makes some exceptions for MileagePlus members.

How far is Boston from Denver?

BOS and DEN 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.