Dallas-Fort Worth to Denver (DFW–DEN) — Airlines, Schedules & Connections

DFW Airport Page →
641 mi airlines charter/private 300/wk
On-time Some delays Frequent delays
Flight Schedule 104 flights Verified 22m ago
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop
Y42330cs
Y4 Volaris
A20N
5:18 AM
CDT TE
6:33 AM
MDT
2h 15m
33%
M T W T F S S
Prices
F92147+2
F9 Frontier
A20N
5:18 AM
CDT TE
6:31 AM
MDT
2h 13m
22%
M T W T F S S
Prices
AC5307cs
AC Air Canada
739
5:45 AM
CDT TE
6:53 AM
MDT
2h 8m
34%
M T W T F S S
Prices
UA773+1
UA United
319
5:45 AM
CDT TE
6:54 AM
MDT
2h 9m
37%
M T W T F S S
Prices
AA1523+6
AA American
738
8:25 AM
CDT TD
9:37 AM
MDT
2h 12m
40%
M T W T F S S
Prices
AA1756+2
AA American
738
8:35 AM
CDT
9:42 AM
MDT
2h 7m
40%
M T W T F S S
Prices
UA644+1
UA United
738
8:45 AM
CDT TE
10:06 AM
MDT
2h 21m
37%
M T W T F S S
Prices
F92549+1
F9 Frontier
A20N
9:07 AM
CDT TE
10:28 AM
MDT
2h 21m
22%
M T W T F S S
Prices
Y42432cs
Y4 Volaris
321
9:14 AM
CDT TE
10:35 AM
MDT
2h 21m
33%
M T W T F S S
Prices
AA2359+5
AA American
321
11:20 AM
CDT
12:23 PM
MDT
2h 3m
40%
M T W T F S S
Prices
UA2049+1
UA United
319
11:35 AM
CDT TE
12:45 PM
MDT
2h 10m
37%
M T W T F S S
Prices
AA943
AA American
321
12:36 PM
CDT
1:44 PM
MDT
2h 8m
40%
M T W T F S S
Prices
QR2508cs
QR Qatar
321
12:47 PM
CDT TA
1:57 PM
MDT
2h 10m
27%
M T W T F S S
Prices
AA420+9
AA American
321
1:15 PM
CDT TC
2:21 PM
MDT
2h 6m
40%
M T W T F S S
Prices
BA1951cs
BA British
321
1:15 PM
CDT
2:21 PM
MDT
2h 6m
24%
M T W T F S S
Prices
UA248+2
UA United
320
1:44 PM
CDT TE
2:55 PM
MDT
2h 11m
37%
M T W T F S S
Prices
BA1953cs
BA British
321
2:26 PM
CDT TB
3:32 PM
MDT
2h 6m
24%
M T W T F S S
Prices
QF4395cs
QF Qant
738
2:40 PM
CDT
3:53 PM
MDT
2h 13m
39%
M T W T F S S
Prices
QR2365cs
QR Qatar
738
2:40 PM
CDT TC
3:53 PM
MDT
2h 13m
27%
M T W T F S S
Prices
Y42776cs
Y4 Volaris
321
2:44 PM
CDT TE
4:05 PM
MDT
2h 21m
33%
M T W T F S S
Prices
AA1832+10
AA American
321
3:06 PM
CDT TB
4:04 PM
MDT
1h 58m
40%
M T W T F S S
Prices
GF4315cs
GF Great Barrier Airlines
321
3:10 PM
CDT TB
4:18 PM
MDT
2h 8m
50%
M T W T F S S
Prices
QR2268cs
QR Qatar
738
4:12 PM
CDT
5:19 PM
MDT
2h 7m
27%
M T W T F S S
Prices
BA1949cs
BA British
321
4:13 PM
CDT TD
5:20 PM
MDT
2h 7m
24%
M T W T F S S
Prices
QF3081+1
QF Qant
321
4:13 PM
CDT
5:19 PM
MDT
2h 6m
39%
M T W T F S S
Prices
AA1322+10
AA American
321
4:13 PM
CDT
5:20 PM
MDT
2h 7m
40%
M T W T F S S
Prices
QF3075
QF Qant
738
4:13 PM
CDT
5:21 PM
MDT
2h 8m
39%
M T W T F S S
Prices
F94463+2
F9 Frontier
A20N
4:18 PM
CDT TE
5:37 PM
MDT
2h 19m
22%
M T W T F S S
Prices
GF4178cs
GF Great Barrier Airlines
738
4:25 PM
CDT TD
5:39 PM
MDT
2h 14m
50%
M T W T F S S
Prices
UA1303+1
UA United
738
4:50 PM
CDT TE
6:20 PM
MDT
2h 30m
37%
M T W T F S S
Prices
AV2021cs
AV avianca
738
4:50 PM
CDT TE
6:20 PM
MDT
2h 30m
M T W T F S S
Prices
F92631+2
F9 Frontier
32N
6:18 PM
CDT TE
7:35 PM
MDT
2h 17m
22%
M T W T F S S
Prices
F91323+1
F9 Frontier
32N
6:18 PM
CDT TE
7:35 PM
MDT
2h 17m
22%
M T W T F S S
Prices
AY4161cs
AY Finnair
321
6:30 PM
CDT
7:36 PM
MDT
2h 6m
M T W T F S S
Prices
QR2256cs
QR Qatar
321
6:30 PM
CDT TC
7:36 PM
MDT
2h 6m
27%
M T W T F S S
Prices
AA2235+4
AA American
321
6:30 PM
CDT TC
7:36 PM
MDT
2h 6m
40%
M T W T F S S
Prices
BA1950cs
BA British
321
6:30 PM
CDT TA
7:36 PM
MDT
2h 6m
24%
M T W T F S S
Prices
IB4106cs
IB Iberia
321
6:44 PM
CDT TB
7:55 PM
MDT
2h 11m
M T W T F S S
Prices
UA1602+1
UA United
319
6:45 PM
CDT TE
8:15 PM
MDT
2h 30m
37%
M T W T F S S
Prices
Y42449cs
Y4 Volaris
32N
7:15 PM
CDT TE
8:43 PM
MDT
2h 28m
33%
M T W T F S S
Prices
BA1952cs
BA British
321
8:02 PM
CDT
9:11 PM
MDT
2h 9m
24%
M T W T F S S
Prices
CX7643cs
CX Cathay Pacific
321
8:02 PM
CDT TD
9:11 PM
MDT
2h 9m
4%
M T W T F S S
Prices
AA577+5
AA American
321
8:02 PM
CDT TC
9:11 PM
MDT
2h 9m
40%
M T W T F S S
Prices
GF6593cs
GF Great Barrier Airlines
321
8:29 PM
CDT TD
9:38 PM
MDT
2h 9m
50%
M T W T F S S
Prices
QR2361cs
QR Qatar
A21N
8:51 PM
CDT TA
9:59 PM
MDT
2h 8m
27%
M T W T F S S
Prices
F94069
F9 Frontier
32N
9:31 PM
CDT TE
10:55 PM
MDT
2h 24m
22%
M T W T F S S
Prices
AA662+3
AA American
321
10:45 PM
CDT TA
11:55 PM
MDT
2h 10m
40%
M T W T F S S
Prices
BA6867cs
BA British
321
5:00 AM
MDT
8:06 AM
CDT
2h 6m
37%
M T W T F S S
Prices
AA2612+1
AA American
321
5:00 AM
MDT TC
8:06 AM
CDT
2h 6m
56%
M T W T F S S
Prices
Y42433cs
Y4 Volaris
32N
5:05 AM
MDT
8:09 AM
CDT
2h 4m
59%
M T W T F S S
Prices
F92550+2
F9 Frontier
A20N
5:05 AM
MDT
8:09 AM
CDT
2h 4m
51%
M T W T F S S
Prices
AA2078
AA American
321
6:22 AM
MDT
9:29 AM
CDT
2h 7m
56%
M T W T F S S
Prices
AA1090
AA American
321
7:13 AM
MDT TC
10:22 AM
CDT
2h 9m
56%
M T W T F S S
Prices
BA1876cs
BA British
321
7:13 AM
MDT
10:22 AM
CDT
2h 9m
37%
M T W T F S S
Prices
JL7259+2
JL Japan
321
7:26 AM
MDT
10:31 AM
CDT
2h 5m
M T W T F S S
Prices
AC4043cs
AC Air Canada
319
7:32 AM
MDT
10:39 AM
CDT
2h 7m
34%
M T W T F S S
Prices
AV2020cs
AV avianca
319
7:32 AM
MDT
10:39 AM
CDT
2h 7m
32%
M T W T F S S
Prices
UA2160+2
UA United
319
7:32 AM
MDT
10:39 AM
CDT
2h 7m
37%
M T W T F S S
Prices
BA5624cs
BA British
738
8:59 AM
MDT TC
12:02 PM
CDT
2h 3m
37%
M T W T F S S
Prices
QR2260cs
QR Qatar
738
9:18 AM
MDT
12:21 PM
CDT
2h 3m
25%
M T W T F S S
Prices
UA1350+2
UA United
320
9:40 AM
MDT
12:48 PM
CDT
2h 8m
37%
M T W T F S S
Prices
UA355
UA United
320
9:40 AM
MDT
12:48 PM
CDT
2h 8m
37%
M T W T F S S
Prices
Y42589cs
Y4 Volaris
A20N
9:52 AM
MDT
1:01 PM
CDT
2h 9m
59%
M T W T F S S
Prices
F93366+1
F9 Frontier
A20N
10:09 AM
MDT
1:22 PM
CDT
2h 13m
51%
M T W T F S S
Prices
AA1523+6
AA American
738
10:21 AM
MDT
1:17 PM
CDT
1h 56m
56%
M T W T F S S
Prices
QR8214
QR Qatar
738
10:28 AM
MDT
1:30 PM
CDT
2h 2m
25%
M T W T F S S
Prices
IB4405cs
IB Iberia
738
10:28 AM
MDT TC
1:30 PM
CDT
2h 2m
34%
M T W T F S S
Prices
GF6621cs
GF Great Barrier Airlines
738
10:28 AM
MDT
1:30 PM
CDT
2h 2m
37%
M T W T F S S
Prices
AA1756+2
AA American
738
10:33 AM
MDT TC
1:34 PM
CDT
2h 1m
56%
M T W T F S S
Prices
BA1874cs
BA British
321
10:38 AM
MDT TC
1:40 PM
CDT
2h 2m
37%
M T W T F S S
Prices
QR2321cs
QR Qatar
321
10:38 AM
MDT
1:40 PM
CDT
2h 2m
25%
M T W T F S S
Prices
IB4012+1
IB Iberia
321
10:38 AM
MDT
1:40 PM
CDT
2h 2m
34%
M T W T F S S
Prices
F94070+1
F9 Frontier
32N
12:18 PM
MDT
3:23 PM
CDT
2h 5m
51%
M T W T F S S
Prices
AY4240cs
AY Finnair
321
12:39 PM
MDT TC
3:46 PM
CDT
2h 7m
M T W T F S S
Prices
BA1875cs
BA British
321
12:39 PM
MDT TC
3:46 PM
CDT
2h 7m
37%
M T W T F S S
Prices
GF6574+2
GF Great Barrier Airlines
321
1:13 PM
MDT
4:17 PM
CDT
2h 4m
37%
M T W T F S S
Prices
QF4303cs
QF Qant
321
1:19 PM
MDT
4:23 PM
CDT
2h 4m
M T W T F S S
Prices
AA2359+5
AA American
321
1:34 PM
MDT TC
4:31 PM
CDT
1h 57m
56%
M T W T F S S
Prices
UA578+1
UA United
320
1:45 PM
MDT
4:51 PM
CDT
2h 6m
37%
M T W T F S S
Prices
AC3371cs
AC Air Canada
320
1:45 PM
MDT
4:51 PM
CDT
2h 6m
34%
M T W T F S S
Prices
GF6472cs
GF Great Barrier Airlines
321
2:41 PM
MDT
5:48 PM
CDT
2h 7m
37%
M T W T F S S
Prices
G36351cs
G3 Sky Express
321
2:41 PM
MDT
5:48 PM
CDT
2h 7m
M T W T F S S
Prices
IB4706cs
IB Iberia
321
3:11 PM
MDT
6:21 PM
CDT
2h 10m
34%
M T W T F S S
Prices
BA1878cs
BA British
321
3:11 PM
MDT
6:21 PM
CDT
2h 10m
37%
M T W T F S S
Prices
AA420+9
AA American
321
3:11 PM
MDT
6:21 PM
CDT
2h 10m
56%
M T W T F S S
Prices
QF3113
QF Qant
321
3:11 PM
MDT
6:21 PM
CDT
2h 10m
M T W T F S S
Prices
UA414
UA United
739
4:20 PM
MDT
7:22 PM
CDT
2h 2m
37%
M T W T F S S
Prices
Y42707cs
Y4 Volaris
321
5:00 PM
MDT
8:21 PM
CDT
2h 21m
59%
M T W T F S S
Prices
AA1832+10
AA American
321
5:07 PM
MDT TC
8:01 PM
CDT
1h 54m
56%
M T W T F S S
Prices
G36131cs
G3 Sky Express
321
5:14 PM
MDT
8:20 PM
CDT
2h 6m
M T W T F S S
Prices
IB4597cs
IB Iberia
321
5:14 PM
MDT
8:20 PM
CDT
2h 6m
34%
M T W T F S S
Prices
F92148+1
F9 Frontier
32N
5:23 PM
MDT
8:36 PM
CDT
2h 13m
51%
M T W T F S S
Prices
Y42331cs
Y4 Volaris
320
5:25 PM
MDT
8:36 PM
CDT
2h 11m
59%
M T W T F S S
Prices
BA1873cs
BA British
321
6:10 PM
MDT TC
9:19 PM
CDT
2h 9m
37%
M T W T F S S
Prices
CX7640cs
CX Cathay Pacific
321
6:10 PM
MDT
9:19 PM
CDT
2h 9m
M T W T F S S
Prices
QF3075
QF Qant
738
6:11 PM
MDT
9:15 PM
CDT
2h 4m
M T W T F S S
Prices
GF4139cs
GF Great Barrier Airlines
738
6:30 PM
MDT
9:37 PM
CDT
2h 7m
37%
M T W T F S S
Prices
QR2279cs
QR Qatar
738
6:43 PM
MDT
9:47 PM
CDT
2h 4m
25%
M T W T F S S
Prices
AC3093cs
AC Air Canada
738
6:53 PM
MDT
9:59 PM
CDT
2h 6m
34%
M T W T F S S
Prices
UA1565+1
UA United
738
6:53 PM
MDT
9:59 PM
CDT
2h 6m
37%
M T W T F S S
Prices
AA1322+10
AA American
321
7:52 PM
MDT
10:40 PM
CDT
1h 48m
56%
M T W T F S S
Prices
F92632+2
F9 Frontier
32N
8:33 PM
MDT
11:44 PM
CDT
2h 11m
51%
M T W T F S S
Prices
UA2239+1
UA United
B39M
8:53 PM
MDT
11:59 PM
CDT
2h 6m
37%
M T W T F S S
Prices
Y42450cs
Y4 Volaris
32N
9:28 PM
MDT
12:38 AM+1
CDT
2h 10m
59%
M T W T F S S
Prices

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
CVN Clovis 3h 25m KG KG Clovis (CVN) to Denver flights
OKC Oklahoma City 3h 46m AAASAY ACF9UA Oklahoma City (OKC) to Denver flights
TUL Tulsa 3h 51m AAASAY ACEJAUA Tulsa (TUL) to Denver flights
COS Colorado Springs 3h 55m AABAQF ACCMEJA Colorado Springs (COS) to Denver flights
ABI Abilene 3h 57m AAASMRA UA Abilene (ABI) to Denver flights
ICT Wichita 4h 4m AAASAY ACUAWN Wichita (ICT) to Denver flights
AMA Amarillo 4h 4m AAASBA UA Amarillo (AMA) to Denver flights
ABQ Albuquerque 4h 7m AAAYBA ACCMUA Albuquerque (ABQ) to Denver flights
MAF Midland 4h 8m AAASBA UAWN Midland (MAF) to Denver flights
AUS Austin 4h 10m AAASAY ACDLF9 Austin (AUS) to Denver flights
1-STOP More options, longer trips
2-STOP Loading... Reach the hardest destinations
Dallas-Fort Worth to Denver
4 carriers, 300 flights/week nonstop.
4 Airlines 641 mi 2h 9m nonstop -1h behind

DFW–DEN is served by 4 airlines with nonstop service. American Airlines, United Airlines and Frontier lead the route. The flight covers 641 miles in approximately 2h 9m. Beyond nonstop, 1-stop connecting options are also available.

Airline Landscape

All carriers operating nonstop DFW–DEN service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AA American Airlines Also: AY, BA, CX, FJ, G3, GF, IB, QF, QR 65 321, 738 1h58-2h12 66% Oneworld AY, BA, CX, FJ, G3, GF, IB, QF, QR
UA United Airlines Also: AC, AV 41 319, 320, 738 2h09-2h30 66% Star Alliance AC, AV
F9 Frontier Also: Y4 36 32N, A20N 2h13-2h24 66% Y4
KG Key Lime Air 0 66%
Aircraft on this route
319 Airbus A319 – UA
320 Airbus A320 – UA
321 Airbus A321 – AA, AY, BA, CX, GF, IB, QF, QR, Y4
32N Airbus A320neo – F9, Y4
738 Boeing 737-800 – AA, AV, GF, QF, QR, UA
739 Boeing 737-900 – AC
A20N Airbus A320neo – F9, Y4
A21N Airbus A321neo – QR
Alliance coverage
Oneworld: AA (65 flights/wk, 46%)
Star Alliance: UA (41 flights/wk, 29%)
Unaffiliated: F9 + KG (36 flights/wk, 25%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, DFW to DEN direction.
Mon
44
flights
Tue
41
flights
Wed
44
flights
Thu
43
flights
Fri
44
flights
Sat
43
flights
Sun
41
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
47
Nonstop flights
300
Outbound / wk
384
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for DFW to DEN.
1-STOP
One-Stop Connections
187
Hubs
~3h
Fastest
~45h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
6,413
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.

On-Time Performance

What to expect at each end of your journey.
Outbound
DFW → DEN
66%
Moderate delays possible. Allow buffer time.
Departing
66%
Arriving
75%
Return
DEN → DFW
40%
Frequent delays expected. Consider flexible booking.
Departing
40%
Arriving
77%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. DFW delays → DEN delays →

Other ways to reach Denver from Dallas-Fort Worth

Nearby airports with service to Denver International Airport.
Metric DFW→DEN DAL→DEN GRK→DEN
Distance from DFW 12 mi 135 mi
Nonstop airlines 4 9 2
Weekly flights 300 67 1
Flight time 2h 9m 1h 55m 1h 47m
Departure OTP 66%
Airports within 200 miles of DFW with service to Denver International Airport.

Travel Essentials

Practical planning for this route.
Time Difference
-1h
Denver is 1 hour behind Dallas-Fort Worth.
DFW: CDT · DEN: MDT

When it's 6:00 PM in Dallas-Fort Worth, it's 5:00 PM in Denver.
Distance & Flight Time
641 mi / 1,032 km
Nonstop flight time is approximately 2h 9m gate to gate.
Getting to DFW

DART Orange Line runs from downtown Dallas to Terminal A (50 min, $3). TEXRail serves Terminal B from Fort Worth ($2.50). No direct rail connects both cities to DFW; choose based on your origin. Ride-shares cost $25–45 from either city center.DFW's five terminals span 17,000 acres. The free Skylink people mover connects all terminals airside.

Getting from DEN

RTD A Line runs to Denver Union Station (37 min, $10.50) with connections to light rail and bus routes. Taxis have meters; expect $55–65 to downtown.DEN's tent-roof Jeppesen Terminal is a single building; all three concourses connect via the underground automated train. Rental cars are on level 5. For ski resorts, shuttle services depart from Ground Transportation.

Denver Climate

Semi-arid with 300+ days of sunshine. Summers are dry and warm (27–34°C) with afternoon thunderstorms that produce dramatic but brief delays. Winters bring cold temperatures (−8 to 5°C) and heavy blizzards that can shut down ground operations.

Spring snowstorms can be heavier than midwinter ones. Altitude (5,430 ft) means low humidity year-round; stay hydrated.

DFW–DEN Quick Facts

Key statistics for the Dallas-Fort Worth to Denver route.
Route details
Distance641 mi / 1,032 km
Flight time2h 9m
Time difference-1 hour
Airlines (nonstop)4
Weekly flights300 out / 384 return
1-stop connectionsAvailable
Origin: DFW
IATA / ICAODFW / KDFW
TimezoneAmerica/Chicago
Passengers/yr87.8M
Elevation607 ft / 185 m
Destination: DEN
IATA / ICAODEN / KDEN
TimezoneAmerica/Denver
Passengers/yr82.4M
Elevation5,431 ft / 1,655 m

Frequently Asked Questions

Common questions about DFW to DEN flights.
Nonstop flights from Dallas Fort Worth International Airport to Denver International Airport take about 2h 9m gate to gate. The route covers 641 miles.
4 airlines operate flights from DFW to DEN: American Airlines, United Airlines, Frontier and Key Lime Air.
This route has frequent daily service. Check the schedule above for departure days and times in each direction.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Clovis Municipal, OKC Will Rogers World and Tulsa.
Denver is 1 hour behind Dallas-Fort Worth.
Yes, return flights from DEN to DFW are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include DAL, GRK and ABI. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.
American Airlines, Frontier Airlines, Spirit Airlines, Southwest Airlines, and United Airlines all operate DFW-DEN nonstop. At DFW, American uses Terminals A through E depending on the gate; Spirit and Frontier use Terminal E. Southwest does not operate from DFW. Southwest Dallas flights use Dallas Love Field (DAL). United operates from Terminal E at DFW. Denver International has a single Jeppesen Terminal with concourses A, B, and C accessed by underground train.
Denver gets significant winter disruption from Rocky Mountain snowstorms, typically October through April. DEN can close individual runways but rarely shuts completely. Outbound delays from DEN during snowstorms run 30 minutes to two hours. Because DFW is a major hub, delayed DFW arrivals cascade into connecting bank disruptions. American publishes weather waivers during major Denver snowstorms that allow date changes without fees.
American runs the highest frequency at around 265 monthly flights from DFW and offers full-service options including first class and AAdvantage miles. Frontier is a bare-bones carrier where bags and seat selection cost extra. Frontier's base fares can undercut American significantly on this 641-mile route. United also flies the segment from its smaller DFW presence into its Denver hub.

Dallas Fort Worth to Denver: Hub-to-Hub with Five Carriers

DFW-DEN is a well-served 641-mile segment with 112 weekly nonstop departures from DFW alone, and additional service from Dallas Love Field on Southwest. Five carriers compete nonstop: American, Frontier, Spirit, Southwest (from DAL), and United. American accounts for the bulk of DFW departures with 265 monthly flights. Frontier and Spirit serve the price-sensitive segment out of Terminal E. Flight time is 2 hours 8 minutes. Denver International serves as United's second-largest hub and Frontier's hub, so both carriers funnel significant connecting traffic through DEN. Departures run from 05:15 to 22:50.

Denver Airport and Seasonal Patterns

Denver International sits 25 miles from downtown Denver on the High Plains at 1,655 metres elevation. The single Jeppesen Terminal serves all airlines, with concourses A, B, and C linked by an underground automated train. American uses primarily concourse A. Frontier and Spirit use concourse C. Winter weather October through April is the primary delay driver at DEN. Rocky Mountain snowstorms can reduce Denver to single-runway operations and create ground holds affecting DFW departures. Summer thunderstorms in July and August also generate convective delays at DFW that push back Denver departures.