| # Airline Delay Analysis Database |
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| `airline_delay_analysis.db` is a SQLite database that integrates airline operation data, airport metadata, weather conditions, fuel prices, and stock performance to support comprehensive analysis of flight delays in the United States. |
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| It contains the following tables: |
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| 1. `Airline` – core flight-level data |
| 2. `Airports` – airport metadata |
| 3. `Carriers` – airline company information |
| 4. `Weather` – daily weather per city |
| 5. `FuelPrice` – daily jet fuel price |
| 6. `FuelIndex` – normalized fuel price index |
| 7. `StockPrice` – airline-related stock data |
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| # 1. Airline Table |
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| Primary table containing one row per scheduled or operated flight. |
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| ## Location and Identification Columns |
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| | Column | Description | |
| | ------------------- | -------------------------------------- | |
| | `airline_id` | Internal unique row ID. | |
| | `FL_DATE` | Flight date. | |
| | `OP_UNIQUE_CARRIER` | Airline carrier code (e.g., AA, DL). | |
| | `OP_CARRIER_FL_NUM` | Flight number assigned by the carrier. | |
| | `ORIGIN_AIRPORT_ID` | Numeric ID for origin airport. | |
| | `ORIGIN` | Origin airport IATA code. | |
| | `ORIGIN_CITY_NAME` | Origin city name. | |
| | `ORIGIN_STATE_ABR` | State abbreviation. | |
| | `ORIGIN_STATE_FIPS` | FIPS state code. | |
| | `ORIGIN_STATE_NM` | Full state name. | |
| | `ORIGIN_WAC` | World Area Code for origin. | |
| | `DEST_AIRPORT_ID` | Destination airport ID. | |
| | `DEST` | Destination airport IATA code. | |
| | `DEST_CITY_NAME` | Destination city name. | |
| | `DEST_STATE_ABR` | Destination state abbreviation. | |
| | `DEST_STATE_FIPS` | Destination state FIPS code. | |
| | `DEST_STATE_NM` | Destination state name. | |
| | `DEST_WAC` | World Area Code for destination. | |
| | `CRS_DEP_TIME` | Scheduled departure time (HHMM). | |
| | `DEP_TIME` | Actual departure time (HHMM). | |
| | `DEP_DELAY` | Actual departure delay in minutes. | |
| | `DEP_DELAY_NEW` | Departure delay with negative values clipped to zero. | |
| | `DEP_DEL15` | 1 if departure delay is 15 minutes or more. | |
| | `DEP_DELAY_GROUP` | Delay group category (15-minute bins). | |
| | `DEP_TIME_BLK` | Scheduled departure time block (e.g., "0600-0659"). | |
| | `CRS_ARR_TIME` | Scheduled arrival time. | |
| | `ARR_TIME` | Actual arrival time. | |
| | `ARR_DELAY` | Actual arrival delay in minutes. | |
| | `ARR_DEL15` | 1 if arrival delay is 15 minutes or more. | |
| | `ARR_DELAY_GROUP` | Arrival delay group category. | |
| | `ARR_TIME_BLK` | Scheduled arrival time block. | |
| | `CANCELLED` | 1 if the flight was canceled. | |
| | `CANCELLATION_CODE` | Reason code (A=Carrier, B=Weather, C=NAS, D=Security). | |
| | `DIVERTED` | 1 if the flight diverted to another airport. | |
| | `CRS_ELAPSED_TIME` | Scheduled elapsed time in minutes. | |
| | `ACTUAL_ELAPSED_TIME` | Actual elapsed time in minutes. | |
| | `AIR_TIME` | Time spent in the air. | |
| | `FLIGHTS` | Number of flights (usually 1). | |
| | `DISTANCE` | Flight distance in miles. | |
| | `DISTANCE_GROUP` | Distance category (50-mile bins). | |
| | `CARRIER_DELAY` | Delay caused by airline operations. | |
| | `WEATHER_DELAY` | Delay caused by weather conditions. | |
| | `NAS_DELAY` | Delay caused by the National Airspace System. | |
| | `SECURITY_DELAY` | Delay caused by security issues. | |
| | `LATE_AIRCRAFT_DELAY` | Delay caused by previous aircraft arriving late. | |
| | `DEP_DELAY_OVER15` | 1 if departure delay ≥ 15 minutes. | |
| | `ARR_DELAY_OVER15` | 1 if arrival delay ≥ 15 minutes. | |
| | `TOTAL_DELAY` | Combined total delay. | |
| | `ANY_DELAY` | 1 if any delay condition is present. | |
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| # 2. Airports Table |
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| | Column | Description | |
| | -------------- | -------------------- | |
| | `airport_id` | Unique airport ID. | |
| | `airport_code` | Airport IATA code. | |
| | `city_name` | City of the airport. | |
| | `state_abbr` | State abbreviation. | |
| | `state_name` | Full state name. | |
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| # 3. Carriers Table |
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| | Column | Description | |
| | -------------- | ---------------------- | |
| | `iata_code` | Airline code. | |
| | `carrier_name` | Official airline name. | |
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| # 4. Weather Table |
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| | Column | Description | |
| | ------------ | --------------------------------- | |
| | `date` | Date of weather record. | |
| | `t2m` | Temperature at 2 meters (Kelvin). | |
| | `v10` | Wind speed at 10 meters. | |
| | `snc` | Snow cover percentage. | |
| | `sde` | Snow depth equivalent. | |
| | `city_name` | City name. | |
| | `state_abbr` | State abbreviation. | |
| | `state_name` | Full state name. | |
| | `lat` | Latitude. | |
| | `lng` | Longitude. | |
| | `t2m_C` | Temperature in Celsius. | |
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| # 5. FuelPrice Table |
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| | Column | Description | |
| | ---------------- | ---------------------- | |
| | `date` | Date of record. | |
| | `jet_fuel_price` | Jet fuel price in USD. | |
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| # 6. FuelIndex Table |
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| | Column | Description | |
| | ---------------- | ---------------------------- | |
| | `date` | Date of index. | |
| | `jet_fuel_index` | Normalized fuel index value. | |
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| # 7. StockPrice Table |
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| | Column | Description | |
| | ------------------- | -------------------------------------- | |
| | `stock_price_id` | Unique row ID. | |
| | `date` | Trading date. | |
| | `price` | Closing price. | |
| | `open_price` | Opening price. | |
| | `high_price` | Highest trading price. | |
| | `low_price` | Lowest trading price. | |
| | `volume` | Number of shares traded. | |
| | `change_percentage` | Percentage change from previous close. | |
| | `company_name` | Company or ETF name. | |
| | `iata_code` | Airline code (if applicable). | |
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