SeatSmart

Flight DL100 — Delta Air Lines

Atlanta (ATL) → Chicago O'Hare (ORD) operated on a Boeing 737-800.

Route Details

  • Airline: Delta Air Lines
  • Aircraft: Boeing 737-800
  • Origin: Atlanta (ATL)
  • Destination: Chicago O'Hare (ORD)
  • Typical duration: 2h 0m

Know Before You Fly — DL100

  • Check in online 24 hours before departure — it's free, takes 2 minutes, and locks in your seat.
  • Verify your carry-on dimensions meet Delta Air Lines size limits before leaving home — gate-check fees are avoidable and delays the boarding process for everyone.
  • Download the Delta Air Lines app and enable push notifications for gate-change and delay alerts — they travel faster than airport PA announcements.
  • Check your portable charger: power banks above 100 Wh require airline approval; above 160 Wh are prohibited in carry-on regardless of airline.
  • Arrive with time to spare: 2 hours for domestic flights — Atlanta (ATL) is one of the busier US airports; security queues can be longer than expected.
  • Save the Chicago O'Hare airport baggage claim number in your phone before you fly — useful if a bag is delayed and you've already left the terminal.

Aircraft — Boeing 737-800

Economy Pitch

30–32 in

Seat Layout

3-3

Power / USB

USB-A (varies)

Entertainment

Streaming / None

Features based on typical configuration — actual cabin may vary by airline and route.

Airport Guide

Atlanta (ATL) — Departure
Full ATL Airport Guide → · Directions & Maps · Terminal Map
Chicago O'Hare (ORD) — Arrival
Full ORD Airport Guide → · Directions & Maps · Baggage Claim Info

Route Intelligence — DL100: Atlanta → Chicago O'Hare

  • Scheduled flight time: 2h 0m. Plan connections, pickups, and meals accordingly.
  • Short-haul flight: the aircraft will reach cruising altitude just in time to begin descent. Wi-Fi is typically unreliable during the first and last 20 minutes due to the angle restrictions of most satellite systems.
  • Full Chicago O'Hare Airport Guide → — terminals, ground transport, lounges, and baggage claim at ORD.

Seat Guide

Check the SeatSmart aircraft guide for this aircraft type for specific seat recommendations, legroom data, and which rows to avoid.

Travel Essentials

Baggage

Carry-on

Fee applies

22 × 14 × 9 in

1st Checked Bag

$35

Max 50 lbs / 23 kg

2nd checked bag: $45

Personal item (always free): 17 × 13 × 8 in

SkyMiles Medallion members and Delta credit cardholders receive free bags.

Special Baggage Fees

Overweight: $100/bag (51–70 lbs); $200/bag (71–100 lbs)

Oversize: $200/bag (>62 in / 158 cm linear)

Sports Equipment: $150 as oversize/overweight checked bag

Musical Instruments: Free in cabin if fits overhead; $150 to check as oversize

Full Delta Air Lines baggage policy → · Carry-on size checker →

Delta Air Lines — Contact & Support

Delta Air Lines airline profile & fleet →

Cabin Classes — Delta Air Lines

Delta Air Lines is the largest US carrier by revenue and consistently ranks among the most reliable, with a hub network anchored by Atlanta (the world's busiest airport). Delta is a SkyTeam member, flies a mixed Airbus and Boeing fleet, and stands out among US airlines for keeping seat-back entertainment screens (Delta Studio) on most of its domestic mainline aircraft rather than shifting entirely to streaming-only cabins.

  • Basic Economy: The cheapest fare class — no seat selection until check-in, no changes, and boards last. Carry-on personal item only on some fares.
  • Main Cabin: Standard economy with a free carry-on bag, seat selection, and mileage earning at the full rate.
  • Delta Comfort+: 34–35 in of pitch (vs. 30–31 in Main Cabin), a dedicated overhead bin, and free alcoholic drinks on longer flights. Free for Gold Medallion+ members and eligible Delta Amex cardholders.
  • Delta Premium Select: Wide-body international upgrade with wider recline seats, upgraded dining, and amenity kits — positioned between Comfort+ and Delta One.
  • Delta One: Delta's business/first cabin. Domestic Delta One is a recliner seat; international long-haul Delta One offers fully lie-flat suites with direct aisle access on most wide-bodies.

📶 Wi-Fi: Free for SkyMiles members on most domestic mainline flights. Delta Sync Wi-Fi runs on Viasat and T-Mobile connectivity depending on aircraft; speeds are generally strong enough for streaming on newer planes. Cost: Free with SkyMiles login (as of 2024 rollout); a small number of regional and older aircraft may still charge.

Expert Tips — Delta Air Lines

  • Log into the Delta app or Wi-Fi portal with your SkyMiles number as soon as you board — free Wi-Fi only activates after you're recognized as a member.
  • Comfort+ and exit-row seats are the best value upgrade if you don't have status — 4-6 extra inches of pitch for a modest fee at booking.
  • Delta's A220 has a 2-3 layout with no middle seat on the left side (seats A/B) — request it specifically when flying that aircraft.
  • Set a fare alert or check the Delta app the morning of your flight — Delta releases unsold first class and Comfort+ seats for cheap upgrades close to departure.

If Your Flight Is Delayed

  • Open the Delta Air Lines app immediately — delay and gate-change push notifications arrive faster than PA announcements.
  • If delayed 3+ hours due to a controllable cause, ask the gate agent about meal vouchers or hotel accommodation (overnight delays).
  • Check alternate routings before the agent announces them — having a specific rebooking suggestion ready cuts wait time at the gate.
  • Keep receipts for any meals or transport you pay for during a significant delay — airlines may reimburse reasonable costs under their customer commitment policies.
  • US DOT rule: Airlines must offer a full cash refund if they cancel or make a "significant change" to your flight and you choose not to rebook.

Frequently Asked Questions

What cabin classes does Delta Air Lines offer?

Delta offers five fare/cabin tiers: Basic Economy, Main Cabin, Delta Comfort+, Delta Premium Select (wide-body international only), and Delta One (business/first). Domestic Delta One is a recliner seat, while international Delta One on most wide-bodies is a fully lie-flat suite.

How does Delta SkyMiles Medallion status work?

SkyMiles Medallion has four tiers — Silver, Gold, Platinum, and Diamond — earned by spending Medallion Qualification Dollars (MQDs) on flights. Higher tiers get complimentary upgrades to Comfort+ or Delta One (based on availability), free same-day changes, Sky Club access at Platinum and above, and priority boarding and security.

Is Wi-Fi free on Delta flights?

Yes, as of Delta's 2024 rollout, Delta Sync Wi-Fi is free for all SkyMiles members (which is free to join) on most domestic mainline flights. You need to log in with your SkyMiles number through the Delta app or Wi-Fi portal after boarding for it to activate.

What is Delta's main hub airport?

Delta's largest hub is Hartsfield-Jackson Atlanta International Airport (ATL), the world's busiest airport by passenger traffic. Delta also operates major hubs in Detroit, Minneapolis-St. Paul, Salt Lake City, New York-JFK, and Los Angeles.

Other Delta Air Lines Flights

  • Flight DL1 — New York (JFK) to Los Angeles (LAX), Airbus A330-300, 5h 30m
  • Flight DL2 — Los Angeles (LAX) to New York (JFK), Airbus A330-300, 5h 40m
  • Flight DL5 — Atlanta (ATL) to New York (JFK), Boeing 737-800, 2h 20m
  • Flight DL15 — New York (JFK) to Paris (CDG), Boeing 767-400ER, 7h 20m
  • Flight DL150 — Atlanta (ATL) to Boston (BOS), Airbus A220-300, 2h 45m

All Delta Air Lines seat guides & routes →

Related: Delta Air Lines baggage policy · Compare all airline baggage fees · Carry-on size checker · Track this flight live