Seattle to Dallas-Fort Worth (SEA–DFW) — Airlines, Schedules & Connections

SEA Airport Page →
1,658 mi airlines charter/private 310/wk
On-time Some delays Frequent delays
Flight Schedule 110 flights Verified 51m ago
Also flown by charter / private operators.
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop
AA3278
AA American
321
12:44 AM
PDT
6:43 AM
CDT
3h 59m
49%
M T W T F S S
Prices
AA2429
AA American
321
12:49 AM
PDT
6:48 AM
CDT
3h 59m
49%
M T W T F S S
Prices
AA2748+3
AA American
321
5:10 AM
PDT
11:10 AM
CDT
4h
49%
M T W T F S S
Prices
IB4896cs
IB Iberia
321
6:00 AM
PDT
12:05 PM
CDT
4h 5m
M T W T F S S
Prices
BA5587cs
BA British
321
6:00 AM
PDT
12:05 PM
CDT
4h 5m
55%
M T W T F S S
Prices
QR3328
QR Qatar
73J
6:00 AM
PDT
12:00 PM
CDT
4h
39%
M T W T F S S
Prices
AY2533cs
AY Finnair
7M9
6:02 AM
PDT
11:59 AM
CDT
3h 57m
22%
M T W T F S S
Prices
AS414+5
AS Alaska
B39M
6:02 AM
PDT
11:59 AM
CDT
3h 57m
29%
M T W T F S S
Prices
GF6429cs
GF Great Barrier Airlines
321
7:09 AM
PDT
1:13 PM
CDT
4h 4m
M T W T F S S
Prices
IB4086cs
IB Iberia
A21N
7:10 AM
PDT
1:13 PM
CDT
4h 3m
M T W T F S S
Prices
AY5710cs
AY Finnair
A21N
7:31 AM
PDT
1:30 PM
CDT
3h 59m
22%
M T W T F S S
Prices
AA1667+7
AA American
32Q
7:31 AM
PDT
1:30 PM
CDT
3h 59m
49%
M T W T F S S
Prices
BA5589cs
BA British
A21N
7:31 AM
PDT
1:30 PM
CDT
3h 59m
55%
M T W T F S S
Prices
IB7269
IB Iberia
73H
7:45 AM
PDT
1:49 PM
CDT
4h 4m
M T W T F S S
Prices
AS340+1
AS Alaska
B39M
7:45 AM
PDT
1:49 PM
CDT
4h 4m
29%
M T W T F S S
Prices
AY2601cs
AY Finnair
73H
7:45 AM
PDT
1:49 PM
CDT
4h 4m
22%
M T W T F S S
Prices
QR2962
QR Qatar
7M9
7:45 AM
PDT
1:49 PM
CDT
4h 4m
39%
M T W T F S S
Prices
DL803+1
DL Delta
BCS3
9:32 AM
PDT TB
3:23 PM
CDT
3h 51m
30%
M T W T F S S
Prices
AA707+5
AA American
321
10:23 AM
PDT
4:32 PM
CDT
4h 9m
49%
M T W T F S S
Prices
BA4398cs
BA British
321
10:23 AM
PDT
4:32 PM
CDT
4h 9m
55%
M T W T F S S
Prices
GF6818cs
GF Great Barrier Airlines
738
10:25 AM
PDT
4:32 PM
CDT
4h 7m
M T W T F S S
Prices
QR3362+1
QR Qatar
7M8
10:33 AM
PDT
4:39 PM
CDT
4h 6m
39%
M T W T F S S
Prices
AS341
AS Alaska
73H
10:59 AM
PDT
5:00 PM
CDT
4h 1m
29%
M T W T F S S
Prices
G36129cs
G3 Sky Express
321
11:41 AM
PDT
5:50 PM
CDT
4h 9m
M T W T F S S
Prices
QF3036cs
QF Qant
A21N
11:41 AM
PDT
5:50 PM
CDT
4h 9m
M T W T F S S
Prices
AA767+6
AA American
321
11:43 AM
PDT
5:54 PM
CDT
4h 11m
49%
M T W T F S S
Prices
QR2963
QR Qatar
73H
12:13 PM
PDT
6:21 PM
CDT
4h 8m
39%
M T W T F S S
Prices
QR2183
QR Qatar
73H
12:13 PM
PDT
6:21 PM
CDT
4h 8m
39%
M T W T F S S
Prices
AS549+3
AS Alaska
7M8
12:46 PM
PDT
6:39 PM
CDT
3h 53m
29%
M T W T F S S
Prices
QR2300
QR Qatar
321
2:03 PM
PDT
8:12 PM
CDT
4h 9m
39%
M T W T F S S
Prices
CX7591cs
CX Cathay Pacific
321
2:03 PM
PDT
8:12 PM
CDT
4h 9m
33%
M T W T F S S
Prices
BA1669cs
BA British
321
2:03 PM
PDT
8:12 PM
CDT
4h 9m
55%
M T W T F S S
Prices
G36171cs
G3 Sky Express
321
2:10 PM
PDT
8:15 PM
CDT
4h 5m
M T W T F S S
Prices
GF6445cs
GF Great Barrier Airlines
321
2:10 PM
PDT
8:15 PM
CDT
4h 5m
M T W T F S S
Prices
IB4422cs
IB Iberia
321
2:10 PM
PDT
8:15 PM
CDT
4h 5m
M T W T F S S
Prices
AA717+9
AA American
321
2:34 PM
PDT
8:17 PM
CDT
3h 43m
49%
M T W T F S S
Prices
AA757+5
AA American
321
3:45 PM
PDT
9:50 PM
CDT
4h 5m
49%
M T W T F S S
Prices
CX7503cs
CX Cathay Pacific
321
3:45 PM
PDT
9:50 PM
CDT
4h 5m
33%
M T W T F S S
Prices
AA727+9
AA American
321
5:45 PM
PDT
11:17 PM
CDT
3h 32m
49%
M T W T F S S
Prices
QR2980cs
QR Qatar
B39M
5:50 PM
PDT
11:59 PM
CDT
4h 9m
39%
M T W T F S S
Prices
KE3050cs
KE Korean
223
5:54 PM
PDT TA
11:59 PM
CDT
4h 5m
37%
M T W T F S S
Prices
AY2597cs
AY Finnair
73J
5:56 PM
PDT
11:59 PM
CDT
4h 3m
22%
M T W T F S S
Prices
AS424+7
AS Alaska
739
5:56 PM
PDT
11:59 PM
CDT
4h 3m
29%
M T W T F S S
Prices
DE5225cs
DE Condor
739
5:56 PM
PDT
11:59 PM
CDT
4h 3m
85%
M T W T F S S
Prices
KE6119cs
KE Korean
B39M
5:58 PM
PDT
11:59 PM
CDT
4h 1m
37%
M T W T F S S
Prices
DL870+1
DL Delta
223
6:07 PM
PDT
12:06 AM+1
CDT
3h 59m
30%
M T W T F S S
Prices
QR3304
QR Qatar
73J
11:00 PM
PDT
5:02 AM+1
CDT
4h 2m
39%
M T W T F S S
Prices
AS542
AS Alaska
73J
11:27 PM
PDT
5:14 AM+1
CDT
3h 47m
29%
M T W T F S S
Prices
AA2003+4
AA American
321
11:31 PM
PDT
5:09 AM+1
CDT
3h 38m
49%
M T W T F S S
Prices
KE8253
KE Korean
1:31 AM
CDT
3:12 AM
PDT
3h 41m
58%
M T W T F S S
Prices
KE8245
KE Korean
748
2:25 AM
CDT
3:56 AM
PDT
3h 31m
58%
M T W T F S S
Prices
KE6120cs
KE Korean
7M9
6:00 AM
CDT TE
8:29 AM
PDT
4h 29m
58%
M T W T F S S
Prices
QR2041cs
QR Qatar
B39M
6:20 AM
CDT TE
8:45 AM
PDT
4h 25m
28%
M T W T F S S
Prices
DL804+2
DL Delta
223
6:20 AM
CDT TE
8:40 AM
PDT
4h 20m
69%
M T W T F S S
Prices
AS543+4
AS Alaska
739
6:24 AM
CDT TE
8:45 AM
PDT
4h 21m
26%
M T W T F S S
Prices
SK3659cs
SK S
223
6:30 AM
CDT TE
8:52 AM
PDT
4h 22m
50%
M T W T F S S
Prices
KE3099cs
KE Korean
BCS3
6:30 AM
CDT TE
8:52 AM
PDT
4h 22m
58%
M T W T F S S
Prices
KJ242
KJ British Mediterranean Airways
744
6:58 AM
CDT
8:22 AM
PDT
3h 24m
M T W T F S S
Prices
AA707+5
AA American
321
7:09 AM
CDT TB
9:32 AM
PDT
4h 23m
37%
M T W T F S S
Prices
KJ244
KJ British Mediterranean Airways
744
7:41 AM
CDT
9:04 AM
PDT
3h 23m
M T W T F S S
Prices
AA767+6
AA American
321
8:20 AM
CDT TA
10:49 AM
PDT
4h 29m
37%
M T W T F S S
Prices
CX7616cs
CX Cathay Pacific
321
8:20 AM
CDT TD
10:49 AM
PDT
4h 29m
4%
M T W T F S S
Prices
G36129+1
G3 Sky Express
321
8:28 AM
CDT TD
10:51 AM
PDT
4h 23m
41%
M T W T F S S
Prices
DE5226cs
DE Condor
B39M
9:00 AM
CDT TE
11:20 AM
PDT
4h 20m
M T W T F S S
Prices
AS365+7
AS Alaska
B39M
9:00 AM
CDT TE
11:20 AM
PDT
4h 20m
26%
M T W T F S S
Prices
QR2038cs
QR Qatar
73J
9:00 AM
CDT TE
11:20 AM
PDT
4h 20m
28%
M T W T F S S
Prices
G36171cs
G3 Sky Express
321
10:53 AM
CDT TB
1:15 PM
PDT
4h 22m
41%
M T W T F S S
Prices
AA717+9
AA American
A21N
11:31 AM
CDT TD
1:44 PM
PDT
4h 13m
37%
M T W T F S S
Prices
AY4200cs
AY Finnair
32Q
12:17 PM
CDT TA
2:31 PM
PDT
4h 14m
M T W T F S S
Prices
AA757+5
AA American
321
12:30 PM
CDT TB
2:53 PM
PDT
4h 23m
37%
M T W T F S S
Prices
AS415+5
AS Alaska
73J
12:57 PM
CDT TE
3:00 PM
PDT
4h 3m
26%
M T W T F S S
Prices
DE5238cs
DE Condor
739
1:02 PM
CDT TE
3:23 PM
PDT
4h 21m
M T W T F S S
Prices
BA2490cs
BA British
321
2:25 PM
CDT TC
4:44 PM
PDT
4h 19m
22%
M T W T F S S
Prices
AA727+9
AA American
321
2:35 PM
CDT TA
4:53 PM
PDT
4h 18m
37%
M T W T F S S
Prices
JX7035cs
JX STARLUX
739
3:36 PM
CDT TE
6:04 PM
PDT
4h 28m
M T W T F S S
Prices
DL803+1
DL Delta
BCS3
4:10 PM
CDT TE
6:18 PM
PDT
4h 8m
69%
M T W T F S S
Prices
DL408
DL Delta
223
4:15 PM
CDT TE
6:35 PM
PDT
4h 20m
69%
M T W T F S S
Prices
KE3061cs
KE Korean
223
4:15 PM
CDT TE
6:43 PM
PDT
4h 28m
58%
M T W T F S S
Prices
AS1580+1
AS Alaska
739
4:16 PM
CDT TE
6:37 PM
PDT
4h 21m
26%
M T W T F S S
Prices
AS260
AS Alaska
73J
4:16 PM
CDT TE
6:37 PM
PDT
4h 21m
26%
M T W T F S S
Prices
AY2600cs
AY Finnair
73H
4:16 PM
CDT TE
6:37 PM
PDT
4h 21m
M T W T F S S
Prices
QR2982cs
QR Qatar
73J
4:16 PM
CDT TE
6:37 PM
PDT
4h 21m
28%
M T W T F S S
Prices
AY2596cs
AY Finnair
73J
4:16 PM
CDT TE
6:37 PM
PDT
4h 21m
M T W T F S S
Prices
AA2009+3
AA American
32Q
4:55 PM
CDT TA
7:15 PM
PDT
4h 20m
37%
M T W T F S S
Prices
BA2488cs
BA British
321
4:55 PM
CDT TB
7:15 PM
PDT
4h 20m
22%
M T W T F S S
Prices
AY4295cs
AY Finnair
A21N
4:55 PM
CDT TA
7:15 PM
PDT
4h 20m
M T W T F S S
Prices
QF3063cs
QF Qant
321
5:15 PM
CDT TC
7:36 PM
PDT
4h 21m
35%
M T W T F S S
Prices
GF6757cs
GF Great Barrier Airlines
321
5:15 PM
CDT TD
7:36 PM
PDT
4h 21m
50%
M T W T F S S
Prices
AY4078cs
AY Finnair
321
5:15 PM
CDT TC
7:36 PM
PDT
4h 21m
M T W T F S S
Prices
AS322+1
AS Alaska
73H
6:03 PM
CDT TE
8:24 PM
PDT
4h 21m
26%
M T W T F S S
Prices
AY2546cs
AY Finnair
73H
6:03 PM
CDT TE
8:24 PM
PDT
4h 21m
M T W T F S S
Prices
JX7031cs
JX STARLUX
73J
6:58 PM
CDT TE
9:26 PM
PDT
4h 28m
M T W T F S S
Prices
QR2971cs
QR Qatar
B38M
7:10 PM
CDT TE
9:41 PM
PDT
4h 31m
28%
M T W T F S S
Prices
JX7033+1
JX STARLUX
73J
7:13 PM
CDT TE
9:44 PM
PDT
4h 31m
M T W T F S S
Prices
BA2491cs
BA British
321
8:13 PM
CDT TA
10:32 PM
PDT
4h 19m
22%
M T W T F S S
Prices
CX7515cs
CX Cathay Pacific
321
8:13 PM
CDT TB
10:32 PM
PDT
4h 19m
4%
M T W T F S S
Prices
IB4301cs
IB Iberia
321
8:29 PM
CDT
10:47 PM
PDT
4h 18m
M T W T F S S
Prices
GF6585cs
GF Great Barrier Airlines
321
8:29 PM
CDT
10:47 PM
PDT
4h 18m
50%
M T W T F S S
Prices
AA2003+4
AA American
321
8:35 PM
CDT TC
10:50 PM
PDT
4h 15m
37%
M T W T F S S
Prices
QR2039
QR Qatar
73J
8:45 PM
CDT TE
11:05 PM
PDT
4h 20m
28%
M T W T F S S
Prices
AS550+3
AS Alaska
73J
8:45 PM
CDT TE
11:05 PM
PDT
4h 20m
26%
M T W T F S S
Prices
AA3223
AA American
321
9:22 PM
CDT
11:39 PM
PDT
4h 17m
37%
M T W T F S S
Prices
AA2411
AA American
321
9:22 PM
CDT TC
11:44 PM
PDT
4h 22m
37%
M T W T F S S
Prices
AA1080
AA American
321
9:22 PM
CDT TA
11:44 PM
PDT
4h 22m
37%
M T W T F S S
Prices
AA1078
AA American
321
9:22 PM
CDT
11:44 PM
PDT
4h 22m
37%
M T W T F S S
Prices
AA1339
AA American
321
9:22 PM
CDT TA
11:44 PM
PDT
4h 22m
37%
M T W T F S S
Prices
BA2489+1
BA British
321
10:41 PM
CDT
12:59 AM+1
PDT
4h 18m
22%
M T W T F S S
Prices
GF4100
GF Great Barrier Airlines
321
10:41 PM
CDT
12:59 AM+1
PDT
4h 18m
50%
M T W T F S S
Prices
IB4691
IB Iberia
321
10:41 PM
CDT
12:59 AM+1
PDT
4h 18m
M T W T F S S
Prices
AA1487
AA American
321
10:41 PM
CDT TA
12:59 AM+1
PDT
4h 18m
37%
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
BIL Billings 5h 32m ASAYBA AAASQF Billings (BIL) to Dallas-Fort Worth flights
PDX Portland 5h 40m AMASAY AAASAY Portland (PDX) to Dallas-Fort Worth flights
SLC Salt Lake City 5h 41m AMASAY AAAMBA Salt Lake City (SLC) to Dallas-Fort Worth flights
DEN Denver 5h 41m 8CASAY AAACAV Denver (DEN) to Dallas-Fort Worth flights
ABQ Albuquerque 5h 46m ASAYDL AAAYBA Albuquerque (ABQ) to Dallas-Fort Worth flights
BOI Boise 5h 46m AMASAY AAASIB Boise (BOI) to Dallas-Fort Worth flights
OKC Oklahoma City 5h 51m ASAYJL AAASAY Oklahoma City (OKC) to Dallas-Fort Worth flights
GEG Spokane 5h 51m AFAMAS AAASIB Spokane (GEG) to Dallas-Fort Worth flights
TUL Tulsa 6h 1m AS AAASAY Tulsa (TUL) to Dallas-Fort Worth flights
RNO Reno 6h 11m ASAYDE AAAYBA Reno (RNO) to Dallas-Fort Worth flights
1-STOP More options, longer trips
2-STOP Loading... Reach the hardest destinations
Seattle to Dallas-Fort Worth
3 carriers, 310 flights/week nonstop.
3 Airlines 1,658 mi 4h 4m nonstop +2h ahead

SEA–DFW is served by 3 airlines with nonstop service. American Airlines, Alaska Airlines and Delta Air Lines lead the route. The flight covers 1,658 miles in approximately 4h 4m. Beyond nonstop, 1-stop connecting options are also available.

Airline Landscape

All carriers operating nonstop SEA–DFW service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AA American Airlines Also: AY, BA, CX, G3, GF, IB, QF, QR 61 321, 32Q 3h32-4h11 74% Oneworld AY, BA, CX, G3, GF, IB, QF, QR
AS Alaska Airlines Also: AY, DE, HA, IB, KE, QR 41 739, 73H, 73J, 7M8, B39M 3h47-4h04 74% Oneworld AY, DE, HA, IB, KE, QR
DL Delta Air Lines Also: KE 14 223, BCS3 3h51-3h59 74% SkyTeam KE
Aircraft on this route
223 Airbus A220-300 – DL, KE
321 Airbus A321 – AA, BA, CX, G3, GF, IB, QR
32Q Airbus A321neo – AA
738 Boeing 737-800 – GF
739 Boeing 737-900 – AS, DE
73H Boeing 737-800 (Winglets) – AS, AY, IB, QR
73J Boeing 737-900ER – AS, AY, QR
7M8 Boeing 737 MAX 8 – AS, QR
7M9 Boeing 737 MAX 9 – AY, QR
A21N Airbus A321neo – AY, BA, IB, QF
B39M Boeing 737 MAX 9 – AS, KE, QR
BCS3 Airbus A220-300 – DL
Alliance coverage
Oneworld: AA + AS (102 flights/wk, 88%)
SkyTeam: DL (14 flights/wk, 12%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, SEA to DFW direction.
Mon
47
flights
Tue
45
flights
Wed
44
flights
Thu
43
flights
Fri
44
flights
Sat
44
flights
Sun
43
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
49
Nonstop flights
310
Outbound / wk
361
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for SEA to DFW.
1-STOP
One-Stop Connections
114
Hubs
~5h
Fastest
~52h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
5,556
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
SEA → DFW
74%
Moderate delays possible. Allow buffer time.
Departing
74%
Arriving
94%
Return
DFW → SEA
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
72%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. SEA delays → DFW delays →

Other ways to reach Dallas-Fort Worth from Seattle

Nearby airports with service to Dallas Fort Worth International Airport.
Metric SEA→DFW BFI→DFW PAE→DFW
Distance from SEA 5 mi 32 mi
Nonstop airlines 3 3 3
Weekly flights 310 1 1
Flight time 4h 4m 3h 5m 3h 51m
Departure OTP 74%
Airports within 200 miles of SEA with service to Dallas Fort Worth International Airport.

Travel Essentials

Practical planning for this route.
Time Difference
+2h
Dallas-Fort Worth is 2 hours ahead of Seattle.
SEA: PDT · DFW: CDT

When it's 6:00 PM in Seattle, it's 8:00 PM in Dallas-Fort Worth.
Distance & Flight Time
1,658 mi / 2,668 km
Nonstop flight time is approximately 4h 4m gate to gate.
Getting to SEA

Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).

Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.

Getting from DFW

DART Orange Line runs to downtown Dallas (50 min, $3). TEXRail reaches downtown Fort Worth in 55 minutes ($2.50). Taxis and ride-shares cost $25–45 to either city center.Rental car facilities are at the south end. All terminals connect via the free Skylink train; this is an airside-only connection, so you must clear security first to use it.

Dallas-Fort Worth Climate

Hot continental climate. Summers are intensely hot (35–40°C) with little rain. Winters are mild (3–12°C) but ice storms hit 2–3 times per year, causing major airport disruptions.

Spring (March–May) brings severe thunderstorms and tornado risk that regularly ground flights. Fall is the best travel window with moderate temperatures and low storm frequency.

SEA–DFW Quick Facts

Key statistics for the Seattle to Dallas-Fort Worth route.
Route details
Distance1,658 mi / 2,668 km
Flight time4h 4m
Time difference+2 hours
Airlines (nonstop)3
Weekly flights310 out / 361 return
1-stop connectionsAvailable
Origin: SEA
IATA / ICAOSEA / KSEA
TimezoneAmerica/Los_Angeles
Passengers/yr50.8M
Elevation433 ft / 132 m
Destination: DFW
IATA / ICAODFW / KDFW
TimezoneAmerica/Chicago
Passengers/yr87.8M
Elevation607 ft / 185 m

Frequently Asked Questions

Common questions about SEA to DFW flights.
Nonstop flights from Seattle–Tacoma International Airport to Dallas Fort Worth International Airport take about 4h 4m gate to gate. The route covers 1,658 miles.
3 airlines operate flights from SEA to DFW: American Airlines, Alaska Airlines and Delta Air Lines.
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 Billings Logan, Portland and Salt Lake City.
Dallas-Fort Worth is 2 hours ahead of Seattle.
Yes, return flights from DFW to SEA are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include BFI and PAE. 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 operates 3 to 5 daily nonstops from its DFW hub. Alaska Airlines runs 2 to 3 daily nonstops from its Seattle hub. The sector is 1,660 miles with a block time of 3 hours 45 minutes to 4 hours eastbound. American flies 737-800 and A321 equipment. Alaska uses 737-900ER and 737 MAX 9. Delta does not fly SEA-DFW nonstop despite its Seattle focus market.
At Seattle-Tacoma (SEA), Alaska Airlines departs from the North Satellite and main terminal gates. American departs from the S Gates in the South Satellite. At DFW, American operates from Terminals A through E, with most domestic arrivals in Terminals A and C. The Skylink people mover connects all DFW terminals airside in about 10 minutes.
Seattle's primary weather issue is low ceilings and fog during fall and winter, particularly November through January. This can cause arrival delays into SEA. DFW experiences severe thunderstorm activity from April through June. North Texas convective storms can shut down DFW for hours at a time. Summer afternoon departures from DFW are the most vulnerable. Morning departures in both directions tend to be the most reliable.
DART Orange Line runs from DFW Terminal A to downtown Dallas in about 50 minutes. Fare is $3. TEXRail runs from DFW Terminal B to downtown Fort Worth in 50 minutes for $2.50. Both rail options avoid highway traffic entirely. Rideshare to downtown Dallas runs $25 to $40. Rideshare to downtown Fort Worth is similar. The rail connections at DFW are among the best at any US airport.

Seattle to Dallas-Fort Worth: Cross-Country Hub Connector

SEA-DFW links two of the largest hub airports in the US across 1,660 miles. American Airlines and Alaska Airlines combine for 5 to 8 daily nonstops. Block time is 3 hours 45 minutes to 4 hours eastbound and slightly longer westbound against prevailing winds. American feeds the route into its massive DFW hub network covering Latin America, Europe, and the US South. Alaska connects the route to its Pacific Northwest and West Coast network. The passenger mix is roughly split between business travelers (tech in Seattle, corporate in Dallas) and connecting traffic flowing through both hubs.

Hub Dynamics and Airport Access

DFW is the fourth-busiest airport in the world by passenger volume. Its Skylink train connects five terminals airside, making connections efficient despite the airport's physical size. Seattle-Tacoma is expanding its international arrivals facility and adding gate capacity in the North Satellite. Both airports have rail connections to their respective downtowns. DART serves Dallas from DFW Terminal A. TEXRail serves Fort Worth from DFW Terminal B. Sound Transit Link Light Rail runs from SEA to downtown Seattle in 40 minutes. The SEA-DFW route is a key spoke for both American and Alaska, and neither carrier is likely to reduce frequency given the hub value at both ends.