- Defs
- 1
- Obs
- 1
- Firms
- 11
- Policy
- 0
- Reports
- 2
Public source dossierPublic datasetBureau of Transportation Statistics
TranStats airline domestic market share March 2025-February 2026
BTS TranStats homepage reporting domestic airline market share for the 12 months ending February 2026.
This dossier follows one source through the observatory without widening its stated scope.
Evidence topology
Where this source enters the observatory
4/7 direct domains · 2 normalized indicators · 1 market · 2026Encoded row volume · log scaleExact counts shown
Public sourceTranStats airline domestic market share March 2025-February 2026Bureau of Transportation Statistics / 5 active routes / 2026
- Record identitybts-transtats-2026Bureau of Transportation Statistics, 2026
- Source classPublic datasetAccessed May 16, 2026
- Encoded scope5 active routes15 direct / 2 indicator rows
- Permitted inferenceTrace + reproduceNo automatic endorsement or comparability
Evidence topology
Where this record enters the observatory
Definitions1market definitionsObservations1market observationsParticipants11participant rowsPolicy records0Not encodedReports2public reportsIndustries0Not encodedGeographies0Not encodedIndicators2normalized indicator observations / normalized route
A zero means this source has no encoded row in that evidence domain. It is a boundary in the current observatory release, not a claim that the underlying institution publishes no relevant evidence. Indicator observations are shown as a separate normalized route and are not added to direct-domain totals.
Market context
Markets reached by this source
Measurement releases
Definitions, observations, and participant rows
- Product boundary
- Domestic scheduled airline passenger traffic
- Geographic boundary
- United States domestic itineraries
- Measurement basis
- Carrier share of domestic scheduled passengers
- Denominator
- Passengers reported in the BTS domestic market-share table for the 12 months ending February 2026
Observation
HHI Not published / incomplete
No market-size total / high confidence
Confidence labels describe the observatory's use of linked measurement and definition rows. They are not grades for the publisher or the source as a whole.
Official record chronology
Policy records backed by this source
No official policy record encoded
This source is not currently attached to an enforcement, inquiry, remedy, settlement, or agency-report event in the public chronology.
Research reuse
Public reports citing this record
Published report
Jul 19, 2026
The U.S. Competition Landscape
Read reportA national briefing that aligns defined-market signals, industry structure, state and local geographic concentration screens, merger activity, and enforcement records without collapsing their different scopes.
2022 and 2017 U.S. Economic Census industry concentration tables, USDA ERS historical meatpacking CR4, KFF 2024 state individual-market HHI, FDIC 2025 statewide and county Summary of Deposits screens, the FY2025 FTC/DOJ HSR report, and source-backed market and enforcement records.
Published report
May 16, 2026
Where Public Market-Share Data Runs Out
Read reportAn open report explaining why the observatory sometimes withholds HHI even when public facts indicate concentration.
BTS public airline market-share table and FTC PBM interim staff report materials.
Industry observatory
NAICS concentration evidence
No NAICS industry rows encoded
This source does not back the Census national industry-concentration tables in the current release. Its other evidence-domain counts remain independently inspectable.
Citation custody
The record behind the rows
Bureau of Transportation Statistics TranStats, Airline Domestic Market Share, March 2025-February 2026.
BTS TranStats homepage reporting domestic airline market share for the 12 months ending February 2026.
Canonical source citation
Bureau of Transportation Statistics TranStats, Airline Domestic Market Share, March 2025-February 2026. Available at https://transtats.bts.gov/Homepage.asp. Accessed May 16, 2026. Antitrust Radar source record bts-transtats-2026: https://antitrustradar.org/sources/bts-transtats-2026
- Publisher
- Bureau of Transportation Statistics
- Access date
- May 16, 2026
- License note
- Public federal government dataset
- Archive
- No archive URL recorded
Source-scoped data packet
Reusable public endpoints
1
Source record
Citation, publisher, access, and license
1
Definitions
Product, geography, denominator, and limits
1
Observations
HHI, market size, status, and methodology
11
Participants
Firm shares, rank, aggregate flags, and custody
0
Official records
Dated enforcement and policy chronology
0
Named edges
Exact organization roles in official records
0
Event windows
Bounded pre, event-year, and post HHI context
2
Indicator observations
Bounded measures carrying this source's custody
2
Reports
Published observatory work citing this source
Interpretation boundary
Use the source at its encoded scope
A source dossier documents how this observatory uses one public record. It does not endorse every claim in that record, make unlike measures comparable, or extend the source beyond its stated product, geography, population, and vintage.